I have a 16 x 28 ft permanent yard made from used cyclone fence pipe and 1" poultry mesh which i can easily expand as my flock grows, I will be starting a permanent house 8'x 12' which will have a dirt floor, I will have a single poop board made of flat metal, which by the way is a discarded swimming pool liner wall, 48" wide and will cover the whole area under the roosts which will be against the back 12' wall, I will be able to pull the full length of metal sheet outside, use a straight edge shovel to remove poop and put in compost or garden, wash it down with a water hose and pull it back inside with a small cable attached to the opposite end. The nests will be on the front wall, there will be about 2.5 ft of open walkway between roosts and nests, the walk way will be covered with sand so it can be cleaned with a common garden rake, 90% of the poop will be under the roosts. Roosts will be made of 2.5 " dia. hardwood saplings mounted on 2x4 diagonal's, will have 4 rungs, that amounts to 48 linear ft of roost for 39 birds.