> ## Documentation Index
> Fetch the complete documentation index at: https://docs.propx402.xyz/llms.txt
> Use this file to discover all available pages before exploring further.

# Investor Strategies

> How the five investment strategy engines work

The `/property-investor` and `/property-full` endpoints run five independent investment models. Each produces a score (0–100), detailed projections, and a plain-language verdict.

## Fix & Flip

ARV sourced from RentCast value high, minus rehab costs, holding costs (6 months), and closing costs (8%). Returns projected profit, ROI %, and MAO via the 70% rule.

**Key outputs:** `projectedProfit`, `roi`, `mao`, `arvEstimate`, `rehabCost`

## Co-Living

Per-room rent vs. single-tenant rate, scaled by bedroom count. Returns rental premium %, break-even occupancy, and projected annual revenue.

**Key outputs:** `perRoomRate`, `rentalPremium`, `annualRevenue`, `breakEvenOccupancy`

## Subject-To

Reverse-engineers the original mortgage using FRED historical rates by sale year. Returns estimated remaining balance, original rate, PITI, and rate-lock advantage vs. current market.

**Key outputs:** `estimatedRemainingBalance`, `estimatedOriginalRate`, `monthlyPITI`, `rateLockAdvantage`

## Short-Term Rental (STR)

Estimates nightly rate from walkability, median income, and bedroom count. Projects annual revenue at estimated occupancy. Compares STR vs. LTR NOI directly.

**Key outputs:** `estimatedNightlyRate`, `estimatedOccupancy`, `projectedAnnualRevenue`, `strPremiumVsLTR`

## BRRRR

75% LTV refinance model. Returns cash left in deal after refi, monthly cash flow, and cash-on-cash return (infinite if full pull-out achieved).

**Key outputs:** `refiAmount`, `cashLeftInDeal`, `monthlyCashFlow`, `cashOnCashReturn`

## Derived Metrics

Calculated on every investor call regardless of strategy:

| Metric                 | Description                     |
| ---------------------- | ------------------------------- |
| Cap Rate               | NOI ÷ property value            |
| GRM                    | Price ÷ annual gross rent       |
| 1% Rule                | Monthly rent ÷ purchase price   |
| DSCR                   | NOI ÷ annual debt service       |
| \$/SqFt                | Value estimate ÷ square footage |
| Value vs. Neighborhood | % below/above median home value |