๐Ÿก Rent vs. Buy ยท Confidence Range Engine
3-scenario simulation: optimistic ยท base ยท pessimistic โ€” see the full range of outcomes
๐Ÿ“ Base Case Inputs
Buyer Net Wealth โ€” All 3 Scenarios
How buyer wealth diverges across optimistic, base, and pessimistic assumptions
Renter Net Wealth โ€” All 3 Scenarios
Renter's invested portfolio across all scenarios
๐Ÿ“ How to read the confidence band
Think of it like a hurricane forecast cone. Center line = base case. Shaded region = full range of outcomes. Narrow band = robust decision. Wide band = sensitive to assumptions. Key question: does the buy band stay above the rent band at your horizon?
Buyer Wealth โ€” Confidence Band
Shaded area = full range. Center line = base case.
Wealth Gap (Buyer โˆ’ Renter) โ€” All Scenarios
Above zero = buyer ahead. Below zero = renter ahead.
Sensitivity Summary โ€” Year 20
Full breakdown: what changes and who wins under each scenario
Equity Accumulation โ€” All 3 Scenarios
Appreciation drives the spread. In pessimistic markets, equity grows purely from principal paydown.
๐Ÿ› Production App: Angular + Python + Postgres + PostGIS + AWS + Podman