Going out on a limb, here is a what if and build. I chose the name as a synonym for Big Foot and Sasquatch, they have products associated with them.
Goal is to have standing room (80"), inside potty, Ham radio, antenna, battery, able to boondocks for a week in an emergency, 4 season camper, solar electric systems, inside sink, maybe small refrigerator, I am sure I'll think of more.
Design- Winter Warrior modified for my height and size. Using a pop-up trailer frame completely torn down recycling as much as possible, including 7 gallon water tank, faucet and sink , 3 burner stove top. TV is 2013 Ford Explorer, V-6 have to keep it light, goal is #800 or less empty.
Building Questions- 1) I am considering a hybrid build. Use foam for most of the structure, with steel or wood for structural engineering. Use a frame for both ends of the solar panel connection, one for the body to hatch join, frame at the back to hold the half panel.
2) What is the best ( least likely to leak) option for the hatch hinge.hurricane or piano with rubber gasket?
3) dimensions for the frame at 96" x 83" . Using a rounded nose and building on to the back, I think we can put an extended Queen size mattress across the trailer. Basically a Queen foot print for the dinette. Seat height 24", ceiling height 60".
I look forward to your feedback.