If you are on a budget, camp in whatever vehicle you already own. I lived in a small car with my wife and cat for several months as we were moving. Learned a ton from “Cheap RV Living” on YouTube.
We had a solar generator with some panels, we cooked using electric skillet, had a twin bed, fairy lights use almost no power, and we had a 12v fridge. It wasn’t that bad but we eventually found a super cheap RV and live in that now.
I have been using a program called GPT4ALL and you can download many models and run them locally. They give you a prompt at boot if you want to share data or not. I select no and use it offline anyway.