As stated, the aero blind is a great option where you can't build a permanent blind. That being said, it is made from EMT tubing. 3/4 inch EMT tubing can be bought for $5 or so for a 10 foot stick. It can be bent by hand with a 20 dollar bender. The mesh that they use is the same as the orange mesh that you see at construction sites and music concerts. As was said above chicken wire can be painted and used. Remeber that the mesh is only being used as a base to attatch your veg to. When you are done you should not be able to see the mesh through the cat tails and other vegetation that you have used. Instead of mesh you could also use 1000 denier cordura as your base. This would provide a wind block as well.
If you have any questions or want any pictures of aero outdoors products, let me know. I live 15 minutes from their shop. Feel free to pm for another Aero outdoors tip