How many do you plan to have? I just found a childes play set at Sams club that I am going to modify for my backyard coop. I think 4 maybe 5 birds tops with a run. But it is well built and looks cutie and not very expensive. Just brought it home today and have not started assembling it yet. Do you know if ISA's are quiet?
I have ISA Browns. They sing when they lay their eggs. There are some older threads by people who have bought playhouses and modified them for their birds.