A development & design proposal prepared for DJ Trauma
A single manufactured/prefab home, built with a pool, tennis court, and outdoor entertaining spaces to command a real experiential-rental premium, designed from the start as an experience rather than a commodity build. Sparrow + Aire Studio acts as Development & Design Director across the full engagement: land development, manufactured home selection and production, construction management, exterior amenity build-out, and interior/furnishing for a short-term-rental-ready property.
A single manufactured/prefab home, sized to match San Bernardino County's short-term rental permit rules, plus a full amenity package built for a $400–$600/night positioning.
Factory-direct manufactured home, Perris CA. $30K–$150K base. Fastest, most cost-controlled path to a completed structure.
Adobe/Spanish-style custom prefab, $200–$360/sf. Higher upfront cost, stronger design-forward positioning that pairs naturally with the amenity package.
Feasibility, utilities, entitlements pathway, and a design master plan before capital commits to construction.
Vendor sourcing, customization, and a siting/design concept, built cost-efficient, designed to still feel intentional.
Site prep, utility hookup, and manufactured home installation through certificate of occupancy.
Pool, tennis court, and outdoor entertaining spaces, plus interior concept, sourcing, and furnishing to bring the property to short-term-rental-ready condition at the $400–$600/night positioning.
How this engagement flows from land development through move-in ready handoff, and how we stay aligned every step. This protocol is referenced in the agreement and shared with vendors at kickoff.
Work begins immediately upon signed agreement and first retainer payment. Due diligence, feasibility testing, and entitlement coordination run in parallel to hit a compressed timeline. Design master plan delivered by week 8; engineered site plan (licensed civil engineer) billed at cost. County review turnaround (perc, grading) is the one variable outside Sparrow + Aire's control that could push this slightly.
Sparrow + Aire owns every decision, vendor negotiation, and design call. Under the Shared Responsibility tier, Tiffany acts as day-to-day co-quarterback, first point of contact for routine communication, schedule coordination, and project tracking, escalating real decisions to Sparrow + Aire.
Once the design master plan and entitlement roadmap are approved, Phase 2 scope and vendor budget are finalized based on Phase 1 findings. This milestone gates the move into home selection.
Vendor comparison runs against both Homes Direct's published floor plans and Blue View's custom adobe/Spanish pricing. A written cost summary is sent for approval before any deposit is placed.
Once the home package is approved in writing, the production order and delivery schedule begin. This milestone gates the move into active construction.
Given the 2-hour distance to Joshua Tree, on-site presence is milestone-driven rather than routine. Sparrow + Aire coordinates all trades and inspections remotely between visits.
Once the manufactured structure is set and move-in ready for finishing, a formal written notice is sent confirming the sourcing phase is opening. DJ Trauma confirms in writing before any procurement hours begin.
Pool and tennis court contractors are managed the same way as every other trade, weekly schedules, 48-hour confirmations, milestone visits. All interior samples and finishes are invoiced to DJ Trauma before any order is placed. No purchase is made without written approval and pre-payment.
Sparrow + Aire reviews completed work against the design master plan and approved specifications before handing the property over move-in ready and STR-ready.
This protocol is referenced in the project agreement and introduced to every vendor and contractor at kickoff. It is how the project stays on schedule and on budget, without DJ Trauma having to manage any vendor directly.
One written update sent each week during active phases, covering progress, decisions needed, and what's next.
Every other week during Phases 2 and 4, a structured meeting covers vendor selections, production status, and sourcing decisions.
At kickoff, Sparrow + Aire is introduced to every vendor and trade, Homes Direct, Blue View, the pool and tennis court contractors, the civil engineer, surveyor, and other trades, as DJ Trauma's design and coordination point of contact. This is documented in the project agreement and communicated in writing to all parties.
One written update is sent each week during active phases, covering what was completed, what is behind schedule and why, and what decisions are needed before Monday. Ad hoc calls are available for time-sensitive decisions between check-ins.
Every Monday, Sparrow + Aire sends a written schedule to the active vendor or contractor confirming what is expected on site or in production that week. This keeps the phase sequenced regardless of vendor lead times.
48 hours before any scheduled delivery, install, or critical milestone, Sparrow + Aire confirms with the vendor or contractor. If something is slipping at this point, there is still time to adjust sequencing or escalate, protecting the timeline from last-minute disruption.
Joshua Tree is 2 hours away, so on-site presence is milestone-driven, not routine. Phase 1 land development is largely administrative and coordinated remotely. Physical visits are required at key milestones: home selection walkthrough, survey/staking confirmation, and water/septic placement. Between milestones, updates are gathered directly from vendors and trades and passed to DJ Trauma in the weekly report.
Sparrow + Aire coordinates every vendor and trade but does not hold final authority over budget or scope, DJ Trauma does. When a delay, deviation, or quality issue arises, it is documented immediately and flagged in writing with the timeline impact and a recommended next step. DJ Trauma directs the next move from there.
Every Friday, a concise written summary is sent: what was completed, what is behind and why, what decisions are needed before Monday, and what is scheduled for the following week. Site photos are included when gathered from a milestone visit or shared by trades on site.
| Responsibility | Sparrow + Aire | Licensed Third Party | DJ Trauma |
|---|---|---|---|
| Design master plan | Authors & delivers | – | Reviews & approves |
| Engineered site plan | Coordinates | Civil engineer stamps & delivers | Pays at cost |
| Vendor sourcing & comparison | Leads | – | Approves final selection |
| County & permitting | Coordinates & tracks | County issues permits | Signs applications as owner of record |
| Construction management | Oversees | Contractor builds | Approves change orders |
| Interior design & furnishings | Designs & sources | – | Approves selections & budget |
| Timely decisions & access | – | – | Provides approvals & property access on schedule |
Itemized cost estimates built from current San Bernardino County fee schedules, verified recent Joshua Tree land development comparables, and live short-term rental market data. These are planning-grade ranges, not bids. Phase 1 testing locks in the real numbers before capital commits to construction.
| Item | Low | High | Basis |
|---|---|---|---|
| Percolation testing | $1,800 | $1,800 | Verified recent JT comparable |
| SB County perc/soil review fee | $1,500 | $1,500 | County engineering review |
| Boundary/topo survey | $2,000 | $2,000 | Verified recent JT comparable |
| Well drilling | $35,000 | $60,000 | $35K verified starting point; depth unknown until drilled |
| Septic design & install | $15,000 | $25,000 | Includes grading/drainage layout, bundled by septic engineer |
| SB County grading plan review | $600 | $900 | County fee; often bundled into septic engineer's scope if under 100 cu yd, confirm in Phase 1 |
| SB County erosion/drainage review | $400 | $1,100 | County fee; same bundling applies, separate civil engineer only if total site disturbance exceeds 100 cu yd |
| Power — off-grid solar (alt.) | $15,000 | $35,000 | Per structure |
| Power — grid extension (recommended if close) | $50,000 | $50,000 | $50/linear ft × 1,000 ft to grid, verified JT comparable; scales with actual distance |
| STR permit application | $1,144 | $1,144 | SB County flat fee, confirmed |
| Subtotal (off-grid scenario) | $57,444 | $92,444 | Excludes grid extension; add $50K+ if grid is selected |
Sources: San Bernardino County FY26 Building & Safety / Land Development fee ordinances; verified recent Joshua Tree land development comparable (survey, perc test, power, well costs); HomeAdvisor/Fixr contractor cost data.
| Item | Low | High | Basis |
|---|---|---|---|
| Option A — Homes Direct base unit | $70,000 | $110,000 | Factory-direct, Perris CA |
| Option A foundation, delivery, hookup | $14,000 | $33,000 | 20–30% of unit cost |
| Option A Subtotal | $84,000 | $143,000 | |
| Exterior siding enhancement buffer | $15,000 | $35,000 | Post-delivery re-clad over stock siding: wire-brushed wood, black steel accents. Ref: Alana Marie Interiors' Malibu mobile home reskin |
| Option B — Blue View custom (~900sf) | $180,000 | $324,000 | $200–$360/sf, adobe/Spanish style, foundation & delivery included in per-sf pricing |
Sources: Homes Direct (Perris, CA) published base pricing; Blue View Manufactured & Modular per-sqft pricing.
| Item | Low | High | Basis |
|---|---|---|---|
| Pool (gunite, desert site prep) | $70,000 | $130,000 | CA average + remote site prep premium |
| Tennis court | $60,000 | $100,000 | Full regulation court, fencing included |
| Outdoor kitchen + covered patio | $25,000 | $50,000 | Contractor benchmark |
| Outdoor showers | $3,000 | $6,000 | |
| Landscape/hardscape | $20,000 | $40,000 | Drought-tolerant desert landscape |
| Amenity Subtotal | $178,000 | $326,000 | |
| Furnishings, STR-ready | $18,000 | $32,000 | Boutique-tier, before 20% procurement fee |
Blended from AirDNA, Rabbu, and GuestFavorites live Joshua Tree market data. Benchmarked against the Isaac French / Rob Abasolo experiential-hospitality model: the shell cost is fixed, design quality is what moves a property from market-average into the top performance tier.
Sources: AirDNA Joshua Tree market data (June 2026); Rabbu Airbnb market data (Apr 2026); GuestFavorites Joshua Tree occupancy tiers (June 2026); Isaac French (Live Oak Lake) and Rob Abasolo (Robuilt) public case studies on design-driven ADR premium. Target tier comparable to active JT listings with pool/amenity packages: Colorful Cactus (4BR, hot tub/BBQ/fire pit) $528–$532/night, Sacred Sands — Lobo Luna $510/night, The Rosemary House (private pool + hot tub) $444/night.
| Responsibility | OPTION AFull-Service | OPTION BShared Responsibility | OPTION CAd Hoc Advisory |
|---|---|---|---|
| Rate | $3,000/mo | $2,000/mo | $175/call (30 min) or $150/hr |
| Vendor selection & negotiation | Sparrow + Aire | Sparrow + Aire | On request, billed per call |
| Design master plan & concept | Sparrow + Aire | Sparrow + Aire | Not included, one-time deliverable already complete |
| Budget oversight & approvals | Sparrow + Aire | Sparrow + Aire | DJ Trauma/Tiffany manage directly |
| Escalation decisions | Sparrow + Aire | Sparrow + Aire | Available per call |
| Final walkthroughs & QC | Sparrow + Aire | Sparrow + Aire | Available per visit, billed separately |
| Day-to-day point of contact | Sparrow + Aire | Tiffany, escalates real decisions | DJ Trauma/Tiffany handle directly |
| Weekly schedule coordination | Sparrow + Aire | Tiffany | Not included, client-managed |
| Friday status report | Compiled & sent by Sparrow + Aire | Drafted by Tiffany, reviewed & sent by Sparrow + Aire | Not included |
| Milestone site visits | Sparrow + Aire attends every visit | Tiffany accompanies; stands in for non-critical check-ins | Available per visit, billed separately |
| Project tracker & invoice log | Sparrow + Aire | Tiffany | Client-managed |
| Best fit | Wants one expert handling everything | Family wants active involvement, lower rate | Occasional expert input only, no ongoing retainer |
| Phase 1: Land Development | Sparrow + Aire | Tiffany |
|---|---|---|
| Title reports, surveys, APN records | ✓ | |
| County pre-application meeting | ✓ | |
| Zoning & manufactured home standards | ✓ | |
| STR permit eligibility | ✓ | |
| Percolation/soil test | Leads | Coordinates on-site date |
| Water source feasibility | ✓ | |
| Power assessment | ✓ | |
| Access/easement review | ✓ | |
| County zoning/setback sign-off | ✓ | |
| Fire district access review | ✓ | |
| Dark sky ordinance check | ✓ | |
| Flood/wash zone confirmation | ✓ | |
| Design master plan | ✓ | |
| Engineered site plan | Coordinates | |
| Site-prep budget | ✓ | |
| Phase 2 kickoff brief | ✓ |
| Phase 2: Manufactured Home Selection | Sparrow + Aire | Tiffany |
|---|---|---|
| Concept & brand positioning | ✓ | |
| Vendor comparison (Homes Direct & Blue View) | Decides | Coordinates calls |
| Floor plan/finish customization | ✓ | |
| Production scheduling & deposit | Approves deposit | Coordinates weekly schedule |
| Phase 3: Construction Management | Sparrow + Aire | Tiffany |
|---|---|---|
| Site prep & foundation | Oversees | Tracks progress between visits |
| Utility hookup | ✓ | |
| Home delivery & set | Milestone visit | Accompanies for notes/photos |
| Final inspections through CO | ✓ |
| Phase 4: Amenity Build-Out & Interior Design | Sparrow + Aire | Tiffany |
|---|---|---|
| Pool & tennis court contractor management | Oversees | Tracks progress between visits |
| Landscape & exterior amenity design | ✓ | |
| Interior design | ✓ | |
| Procurement & furnishing sourcing | Sources | Tracks invoices/payments |
| Installation & staging | Oversees | Coordinates delivery logistics |
Compressed from a standard 90-day sequence: feasibility testing, entitlement coordination, and due diligence run in parallel rather than back-to-back. County review turnaround (perc, grading) is the one variable outside Sparrow + Aire's control.
Every task on the project timeline, mapped to who owns it and why. The pattern holds throughout: decisions, design, money, and signatures stay with Sparrow + Aire. Scheduling, tracking, and logistics can move to Tiffany.
| Task | Owner | Why |
|---|---|---|
| Pull title reports, surveys, APN records | S+A | Requires judgment on what's needed for entitlement |
| County pre-application meeting | S+A | Substantive county liaison |
| Confirm zoning & manufactured home standards | S+A | Determination affects the entire build |
| Confirm STR permit eligibility | S+A | Legal & financial implication |
| Percolation/soil test | S+A | leads; Tiffany confirms the vendor's on-site date |
| Water source feasibility | S+A | Judgment call with major cost impact |
| Power assessment | S+A | Judgment call with major cost impact |
| Access/easement review | S+A | Legal review |
| County zoning/setback sign-off | S+A | County liaison |
| Fire district access review | S+A | Compliance determination |
| Dark sky ordinance check | S+A | Compliance determination |
| Flood/wash zone confirmation | S+A | Risk assessment |
| Design master plan | S+A | Site Design Package deliverable |
| Engineered site plan | S+A coordinates | Civil engineer's stamped work; S+A manages the relationship |
| Site-prep budget | S+A | Financial judgment |
| Phase 2 kickoff brief | S+A | Strategic handoff |
| Task | Owner | Why |
|---|---|---|
| Concept & brand positioning | S+A | Site Design Package deliverable |
| Vendor comparison: Homes Direct & Blue View | S+A | decides; Tiffany coordinates calls |
| Floor plan/finish customization | S+A | Design authorship |
| Production scheduling & deposit | S+A | approves the deposit; Tiffany coordinates the weekly schedule |
| Task | Owner | Why |
|---|---|---|
| Site prep & foundation | S+A | oversees; Tiffany tracks progress between visits |
| Utility hookup | S+A | Technical oversight |
| Manufactured home delivery & set | S+A | Milestone visit, requires physical presence for QC; Tiffany can accompany |
| Final inspections through CO | S+A | Compliance sign-off |
| Task | Owner | Why |
|---|---|---|
| Pool & tennis court contractor management | S+A | oversees; Tiffany tracks progress between visits |
| Landscape & exterior amenity design | S+A | Design authorship |
| Interior design | S+A | Design authorship |
| Procurement & furnishing sourcing | S+A | sources & negotiates; Tiffany tracks invoices |
| Installation & staging | S+A | oversees; Tiffany coordinates delivery logistics |