I used 2x3 and angle cut them on a table saw to build a 6x6, 8 sides. The corners are gone, tall skinny windows for bow. 4 main walls are for gun. Used 1/4" lanau or whatever that flooring underlayment is for walls. 2x8 base on 4x6 post with elevator brackets. Windows are wood frames and use cheap glass from Walmart picture frames. Corners were covered with aluminum trim, never painted. Box under floor holds 20lb propane and is only accessible from inside blind.
Issues. Bottom edge of walls wicks water, starting to separate. Going to look for plastic sheeting. Windows swing inward for less motion. This means water leaks.[/QUOTE
I used exterior plywood. The studs are 2x4 cut at 22.5 degree angles. The floor and joists are wolmanized. The windows are 1/4 inch plexiglass with the hinges riveted on them. I used garage door seal strips to seal them up.
It’s tight and movable.