Best budget platform

I want to keep si simple, want something I can live in, eventually AC.

Is a first gen tundra with leer 122 my best option?

Or would a Toyota Sequoia be a better option?

What about Toyota sienna?

Looking for something I can piece together for under 5k, I did see an air conditioner that doesn’t draw much that could be hooked to a portable battery, I lost the link, if anyone knows of which one that is that’d be great.

P.S. I live in southern California

I’ve also seen portable power banks that have fans and water misters, wondering if that would keep me cool or generate too much humidity

Wondering what the optimal setup is based on these characteristics.

Thank you