Here's a coop I built from stuff people were throwing away. The screened doors are where the hens live. The solid panel on the right swings out to expose the nest boxes. I removed the rollers from some discarded kitchen cabinets and put them on the bottom of the nest boxes. They pull out smoothly, like a cabinet door. The upper level (behind the solid panel door) is for nest boxes. A large space under the boxes is for storage. That saves a lot of trips back and forth from the house.