How Would You Go About Populating Your Own Data Set Similar To Yelp And Google Maps?

I’m trying to build an app for travel. I’ve looked at the APIs and they’re very expensive and don’t allow for long-term caching. OSM is interesting but also requires you to abide by ODbL, which isn’t great if you don’t want to share proprietary info. Are there any approaches or alternatives to using an API or OSM? I haven’t been able to find any great data sets to bulk purchase.