Off Grid

With my new found realization on how easy it is, with a PowerWall, to go off grid, I'm thinking of what might be done in remote places on my property.  I had my first epiphany on utility independence about 10 years ago when I put in my rainwater system: photos

For off site constructed housing, this seems like a good starting point.  Though alarmingly expensive.
 Mustang Ridge modular place

I'm thinking maybe a moveable PV carport kind of thing as the starting point for PV.

Back of my mind ideas: rental for horse riders, rental for COTA visitors,  a retreat for myself, another guest house.

Suggestions solicited.