For the sides and roof, I think its hard to beat Coroplast - that plastic stiff they make signs from. Basically plastic cardboard. Comes in colors, different thicknesses (I use 5mm), fairly inexpensive, weatherproof,light (maybe 4 pounds per 4x8 sheet), can be easily cut with a utility knife, attached with fender washers and drywall screws. What's not to like?
Coroplast even comes in camo now. You can get a 4X8 sheet for under $30 at Lowes. What I worry about is
1) Durability
2) How it holds up to sunlight.
What is your experience with it.
In a similar vein, we had a lady over at the Deer & Deer Hunting forum that used regular corrugated cardboard clad with cheap camo poly tarp for her blinds. They were impressive and cheap and they held up for multiple seasons.
