From the pics of the nest boxes and the roost, someone had alot of chickens. If you're planning on having that many birds, and need that much roost space, all can be kept and used. Maybe put up a wall, or a fence, separating the coop. The roost could be split, and used on both sides, or removed. That's alot of coop, maybe you could section it off and use some for storage. Having space to keep things away from the house is always a plus. Good Luck, keep the pics coming.