5' X 7' X 7' 6" Plywood Deer Blinds $3.01

Interesting. I wonder how it would hold up to 24" of snow on top. My guess is it would take some beefing up but you are right it probably is a good start.
If they're anything like the crates I've gotten lately, they'll need full structural over hauls. But it's a cheap start.
WOW......add a few rafters and a couple studs......and put a rubber roof on those.....some paint and you got it covered. Great deal IMO.
Probably needs a better floor too.

The crate my blasting cabinet came in said "made in china" but the plywood made me think of Japanese paper walls. It's an Allsource cabinet - I guess they only make half their stuff here now. :(