Thanks, it still has a ways to go. I still want to add a mid level platform in a corner near the nestbox where they can run around on a flat surface and then hang toys underneath it. A fixed low voltage metal halogen light and a tiled floor.
As for cost of materials to put it together. It ran me around $400 for the (4) sheets of plexi glass, and $200-$250 for the wood, screws, stainless steel mesh, carpet backing and dowels. Though if i was to do it again I would of gotten the thinner plexiglas that cost $54 a 3'x6' sheet instead of $95.
I actually kind of messed up the design halfway through when i found out the exposed 2x4 columns that had the predrilled dowel holes were pressure treated so I kind of paniced but eventually figured a way to cover them using carpet upholstering which actually turned out well since they can climb up and down the carpet wall. As for the floor it was also supose to to be removeable like the full size rolling drawers you see under low lying beds but my lack of carpentry skills had me quit that design early after a few failed attempts. So for now I'll just be tiling the existing floor board and cleaning up with a shopvac.