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https://en.wikipedia.org/wiki/Last_man

Elestio

Coolify unfortunately didn't click with me, and I had a bad experience with a Redis database, so I stopped using it.

I would recommend Elestio (eles[dot]io) as an alternative which isn't open source, or self-hostable, but met my primary goal of drastically reducing cloud costs. And you can bring your own cloud/server, though I'm choosing to also rent from Hetzner through Elestio.

I'm running two redis databases on machines with 3 cpus, 4gb ram, and 80gb storage for about $80 total (the machines are billed hourly, but you get the max monthly bill up front).

Technically AR not VR, but I recently got a pair of XREAL One AR Glasses, and they work well for your use case.