On the other hand, not all foamies are simple and thrifty. I wanted my interior to be more traditional with the "warmth" of wood, but I liked the idea of the weather proof exterior of the foamie technique and the rounded edges between walls and roof without trim (and thus less chance of leaking).
Light weight isn't as big of a concern for my TV, but if I can build strong enough to carry all of my CI, and other gear required to be self sufficient boon docking in deep wilderness for at least a week, while still keeping the camper weight at least a little lower than an over built tank, then so much the better.
TPCE is not simple, not thrifty, and may not end up lighter than many traditional options, but ... and this is the crux... for what I hope it to be when done...a pseudo off-road capable TD w/ full perimeter frame, heavy suspension, shock absorbers and running gear, 5x9-1/2 size, full wooden interior, and a few other tricks... it should be lighter than a comparable camper would be if I were doing a fully traditional build, slab sided, skeletonized, or even stick built.
Lots of different ways to get there and every road is a journey. One foot in front of the other.
