Are you going to build it onsite or, prefab and transport? How long do you need it to last? I built a "permanent" wood 4 man blind that I made in the garage and made it into transportable/ disassembable sections. 2 guys and 2 14' jon boats handled site assembly in 3 hours, (although it took me almost 40 hours to build/paint etc in garage first). I'll be taking the blind out at the end of the season. Although pressure treated wood is ideal, cost and weight are significant factors if you plan on taking the blind out when the lease ends.