5' tall fence x 150' at the home depot for $115. You can buy steel fence posts at tractor supply for $3 to $5 each. 15' will make a roomy blind and you'll get 10 of them out of your $115
Pile sticks around it and over it. Cut shooting holes in it and line it with a tarp of any old crap you can find. I use landscaping grass woven in the sections.
I place them around all sides of the feeders and I can hunt the wind and approach where I don't have to cross the trails in.