- Just straight up plywood, generally between 1/2 in and 1 in. Strong but heavy, can jigsaw out bits and fill with insulation for weight savings. Fast.
Foamie walls, being glued together with gorilla glue or alternative. Light, but watch out for tree branches. Don't know how well PMF will stick/stay. Kinda fast.
Framed construction: use biscuits or screws and 1x1, 1x2, etc to frame the walls. Fill the gaps with board insulation and affix 1/8 inch plywood to exterior. More work.
In short, I'm trying to determine which of these is the best compromise between cheap, light, and strong (in that order). I'm leaning towards minimal framing (1x1s for border and supports to windows/door/galley) to add some strength to 1 inch 4x8 XPS foam boards with a very thin exterior piece of plywood for the TBII to stick to. Thoughts?