Just picked this up a couple of weeks ago. 6x12 with 6'6" height, RV screen door, and 4-corner jacks, no interior plywood so I can insulate and run wire first.
I'll be dividing the rear portion off from the rest for an outdoor-only 'kitchen area' with just a counter and residential mini-fridge. No plumbing or gas lines in the plans. The front will have a convertible dinette/bed for the wife and me, with bunks above on vertical e-track for my two boys. I got the side compartment door for a 5k' window AC unit when needed. We are working through finish ideas now. Just started underfloor insulation. Hopefully I'll have it mostly complete by spring.