so that is canvas over foam. using contact cement or bondo/fiberglass? (I would think contact cement would dissolve the foam) did the bondo soak through the canvas to stick, then harden? (damn that would be light! and strong. probably even easy to repair...)
the door looks like a refrigerator, but I'd bet you are perfect temp inside, summer or winter, being that well insulated.
I like the 4 section hung window. (where and how much?)
Mask off the vent screen inside and spray paint the screen for a better look, inside. ("vent of computer fan, screen inside.")