More advice, set up a coop before the chickens arrive (now!). Prefabs can be beefed up, if that’s the way you decide to go. I got a little prefab for an isolation coop/broody hen coop. I added latches and reinforced the floor to make it more secure. I discarded the roosts and put a larger single roost in. This is a plastic coop that we had to assemble, like lincoln logs. It is sturdy but pretty small. It sits within a run.