I have an enclosed porch off of my living room and house. It is 60' long ( the length of the house ) and 10 ' wide. It is under roof with a tile floor, sliding glass windows.
My son made a partition off of one of the sliding windows. All I have to do is slide open the window ( screen removed ) and the girls go out to free range - they come back in in the early afternoon and I just slide the window closed to keep them safe and sound.
The great part is that I do not have to brave the elements to feed and water them.. so easy. When they are old enough to lay I will give them a few nest
I have to do a few tweeking - like make a baseboard around the bottom to keep the litter from scattering, and give them a proper roost.