Is there a reason you're hooked on the desktop computer? Maybe you invested a lot in it as a gaming setup? I'd offload it, get a laptop and you're then capable of charging at a library, working there or in the car, in a park, etc. If you're on the cusp of a worsening situation, gaming might be the least of your worries.

Lots of people live in vehicles quite intentionally. It's harder and very often not ideal, but I don't think it's your biggest issue here.