Ok, it wasn't clear because supabase it's not even self-hosted. I checked out baserow and grist and you can connect it to an external postgresql db so it should be valid for your use case.
I personally used omnidb but it looks abandoned
They'll just forbid the sale of these vehicles locally, finger crossed for enough states to do that. Citizens will also have the civic duty to harass these vehicle owners.
That's around 5%, assuming the same performance for 130k it's 6500 copies
Also it had consequences such as