Here's a video of my coop right now (I'm not narrating because 1, I hate my voice, and 2, I'm sick and sound like death). This is how it's been forever, and I definitely have found a few flaws. There used to be nesting boxes on both sides, and they always just slept on top of them. They aren't attached, and there's a gap between the boxes and the wall (LOTS of poo collects in there from overnight). I'll describe the video. First I walk into the entry where the hay/food is one the left, and there's a ladder going up to storage on the right. Then I walk into the actual coop. The floor is plywood and I covered it in sand. Good thought, except I put wood shavings in the nesting boxes and they kicked ALL of them out. My project today is to strain all of the sand and add more. I got a bale of hay yesterday to use that instead. On the right side is a cage for the chicks that are currently out playing in the sun. On the left are the nesting boxes on an identical shelf. I show the gap between the boxes and wall. Then I just show the wall in front of me, where is the only place I can think to mount the boxes somehow. My plan for the two shelves are to close any gaps and turn them into poop boards filled with sand/sweet pdz. I saw in on here and it looks amazing. Then for roosting, I would build something like a really wide ladder with several steps that basically start at the closest-to-me part of the shelf and more or less "lean" against the wall (I would secure them, but you get what I mean). I thought of putting the boxes under the shelf, but then the space and floor blow the boxes would be almost useless and a pain in the rear to clean. Any suggestions??