That's really cool. I'll probably end up trying to reproduce this by following your work step-by-step. I'm not too familiar with OSM, besides having used Nominatim.

Along the same lines we're crowdsourcing a database of hospital prices, starting this week. I'm reviewing our first pull request as we speak. You can follow our progress live. The data is here: https://www.dolthub.com/repositories/dolthub/standard-charge...

We talked a little about the problems we're encountering here: https://docs.google.com/document/d/1uMx1sUYwP_uE7ebd3PtGvF0t... and here https://docs.google.com/document/d/1NifwgKHBCeF35ZRZsfpgg4bE...