The Cluckers Fortress

AACCCCKKKK - Arrow staples! Pull right out if you yank the wire. Hubby needs to cover the edge of the chicken wire with wood screwed in or toss in some poultry staples every few inches.
Why so many nest boxes?? From what I read, 1 for every three or four hens is plenty. By my count, you have enough for over 40 hens. They might like a bit more floor space instead.
"We need to raise the roosts since the Chickens have gotten a bit bigger than when they were put in there."
And move them away from the wall - 12" so their chicken butts have room They also need to be higher than the nest boxes, you don't want them sleeping in the nest boxes.
I put my round fence rail roosts in by drilling a hole in the plywood on the side of the stall and the face of a brace on the 'open end' - 2x4 butt end to the perpendicular wall (2" side up) screwed to the wall and a support block under it that is also screwed to the wall. There is a vertical leg in front that is the same height as the top of the brace so it is connected 4" side to 4" side. Since you are using closet poles, you would need to pin the pole on both sides of the brace and the plywood to keep it from falling out. It will serve as a tension/compression pole and keep the whole thing square. Doesn't have to, and shouldn't, be a big pin! If the hole is just barely larger than the diameter of the pole, a long cotter pin spread just enough it won't slide out (but you can take it out if you want to take it apart for cleaning or something) would work great. The front support (just forward or behind the pole) won't have and side pull so it wouldn't need to be braced. I can't tell from the pictures, but I wonder if there is enough space that you could remove the milk crates on the end of the "L" and have the 'open end' brace in the middle to support a pinned rail from each wall. That would be super strong.

I don't mean to be all negative! It looks like you've done a lot of good stuff for not much money. Always a good thing.

Looking good there. I would suggest that instead of the closet poles that you cut some branches if you got trees around that you can do it. If not use 2 x 4's for roost. If you are in a place that it gets cold, you want to have the poles wide enough that when the chickens are roosting, that their feet are spread wide enough that they bodies will totally cover their feet. I don't know if that makes sense to you. But with the closet poles, when they roost their bodies will leave their toes exposed to the cold.

Ya'll have done a great job so far! Enjoyed reading your page and looking at the images. I bet you have some happy young chickens there!