Every single (opensource) automated location tracker I’ve tried drained battery to the point where it is borderline useful.
Your best bet is to use something like Immich like others mentioned but it lacks specific business data like Google Timeline has, which I don’t think it’s possible with anything else.
Big part of me loving selfhosting stuff is that I get to learn things a lot. I think it’s pretty amazing that these sort of projects exist but I’ll always use good ol’ $BASIC_SERVER_OS.
Also check out https://hledger.org/ more actively maintained ledger Haskell clone(not that the original ledger is unmaintained)
Be careful, outbound traffic from VPS to client is can be expensive.
Organic Maps solely uses OpenStreetMap.