nice to see you’re seeking adventure again. I’ve always been fond of shipping container minimalist living arrangements.
If you did a 8′ X20′ unit, or really went big and used a 40 footer (or a couple of them with a roof in the middle) you can get lots of space.
clad the exterior with something that blends in. buy doors and windows as money allows.
and lastly, my good friend who’s a computer experts expert says, if you plug into the grid to charge, they already know who you are. hence why all secretive installs for the Govy are only run on battery power