Well, we scored a bunch of pallets and after starting to disassemble them I came up with an idea. I asked dh to build one using the pallets like building blocks. So far cost is about $150 and interior space is (2) 3' x 8' coops. I will be using this for the chicks I need to move out of my house and later for breeding coops, the run will be separated too. just going to post one pic for now he was going to use full size for the outside walls but I wanted to keep cost down and keep it warm so I asked him to cut the pallets down.