@coolbeans1r.eth
This will be off-grid 100% electric, haven't figured out heat yet, possibly thinking underfloor radiant heat. I probably cannot make an informed decision until I know how cold/hot is in there during winter. The extra thick walls should keep the temps sorta stable. I will have a heat pump water heater tho. I can hang a mini split in there too if needed. Required to build is just the structural engineering plans, and then everything else is up to me as long as it's to code.