I'm new to chickens - I've got an old barn on my property and I'd like to take a part of it (maybe it was a stall once?) and turn it into a coop. It was probably last sided maybe 30 years ago, so the door is falling apart and some of the eaves are rotted, but no structural problems. This part has a concrete floor. The area is 10 x 15. I'm shooting for about 25 chickens. So, I guess I have to cover the inside with plywood. I have a demo window I got from someone I can probably put in. And put in a run and access point. Anything else? I don't want to break the bank on this.