RunTheNumbers - Backtested personal finance with open data

Show HN: Rent vs. buy, backtested across 241 US metros with pinned data

RunTheNumbers is an open-source project that settles personal finance debates with data. It provides code and pinned datasets behind a series of videos, allowing anyone to reproduce every number on screen. The repository includes simulations for questions like lump sum vs. dollar-cost averaging, the real cost of 1% fees, buying at market tops, and rent vs. buy across 241 US metros. All assumptions are explicit, and the data is cross-validated against independent sources. You can change assumptions, re-run the simulations, and see how the results shift. The project emphasizes transparency and reproducibility, inviting you to not trust it but re-run it.