If you look on the forum there are several threads about building your own coop. Does not have to be too expensive. We built a fairly large coop and run out of an old trampoline frame. Came out really nice. Most expensive part was the hardware cloth!😊
Hard to say without measurements. I looked at the site and I couldn’t see any measurements on there. These prefab chicken coops while they look really nice are usually cheaply made and do not have as much room for the chickens as they state. Also hard to see how tall the coop is based on the...