I recently left a job at an electric resto-mod / conversion startup — the battery chemistries continue advancing while affordability per kWH increases. Hope you can convert your dreams into something special (which you could achieve for much less than $60k)!

If anybody wants to attempt such a rad little travel trailer conversion, I know a guy with several in-need-of-work Airstreams (not sure specific model, but the "iconic" classic -type).

Last spring, Owner literally cut both ends off the crappiest trailer and made it into a bridge across one of his littler creeks (please buy his Airstreams — the neighborhood/environment would appreciate it).

Is "you know a guy" code for "I'm that guy"?

And yeah, the battery prices keep coming down. It's really amazing to watch in real time. A 100ah 12V battery used to be ~$1000, now it's a fraction of that. And 400ah 12V batteries are becoming common.

But, the rest of the electrical system isn't cheap... solar panels, MPPT controller(s), fuse panel and things, control panel, etc. If you need 120V, add an inverter. If you want 120V AC, that inverter needs to be pretty big. Etc. Probably looking at $10k+ for my dream system (granted, that's down from $20k 5 years ago).