I agree with rosemarythyme walk in are way easier to keep clean and it doesn’t seem like a chore more like spending time and interacting with the flock, plus more space = less cleaning) I have seen really nice sheds for under $1000. My husband built my 28x8 cooprun (what I call it as it’s not traditional coop run but meant for them to stay in during the nasty winters) for about $1000. I love being able to walk from on end to the other without tripping over chickens and space for everything. Me and the kids spend a lot of time out there with them even in bad weather.