Here's a little more detail:
We're going to have them placed 20' apart and eventually build a roof over them. I might narrow the space up a bit and go for 16' though. I might be convinced to put a man door on the roof side of each one. Maybe even be convinced to put a window or two in.
Full insulation is probably out. Foam board insulation on the ceiling, maybe. That only requires 10 sheets.
We put our house up for sale on Dec 18 and had a contract by Dec 20 and a backup contract on Dec 21 with closing set for Jan 25. Since Dec 20, we've celebrated the holidays, started packing, found and purchased an RV, prepped a site for parking, power, water, and septic on the farm for the RV, placed the RV, located and purchased two standard 40' sea containers from someone who can actually deliver them before we move (Jan 18 delivery...it's amazing how difficult it is to get one in a timely manner right now), taken care of inspections and remediation, and now I'm working on sorting out **** to sell, give away, or throw away. I should get a roll-off dumpster delivered this week as well. Lots of moving parts, not a lot of time left.
So what will likely happen is one sea container gets filled with boxes and furniture. The other will get filled with my garage ****. I have mostly battery tools these days and everything else but my air compressor and welders can run off of my Honda eu2200i generator. Shop lights and the occasional other thing plugged into an outlet is about all the power I need in the sea container shop. The goal is to be in the RV/sea containers about a year while we figure out what/how to build a house on the farm.
My dad has a small garage. It's crappy and I can't stand his tool "organization." He has buckets of sockets sorted by metric or standard. Aside from a bucket of 1/2" drive metric sockets, his metric tool compliment consists of a little bin with a few cheap metric wrenches, a sparse supply of 1/4" drive metric sockets, and an occasional SAE wrench or socket thrown in for fun. Good luck finding even a ratchet in his garage. I cannot work like that and there's no way I'm going to subject my tools to him losing them or stashing them in whatever secret hiding spots he happens to be near when he doesn't want a tool in his pocket anymore. My spanners are hung on the wall in order with labels above them by size, my sockets are in trays in tool box drawers, my screwdrivers are laid out by size and type in the drawer, etc. The only tool I'm missing right now is a 12mm deep 6 pt socket that I dropped in the engine bay of my Volvo last week and if it hasn't fallen out while I've been driving it, then I'll find it on the belly pan when I change the oil soon. It was a cheap Stanley anyways, so no big loss.