Thanks! Overall, I really like those shelves too! We got a really good deal on two of the smaller ones, those under the window, at Costco. They are a much heavier duty than any of the others and only cost 30 some dollars, don't remember exactly now. The third one under the window was a rack my husband had already had.
Unfortunately, a room to themselves was pretty much a necessity with our evil cat. She seems to have mellowed a bit now she's out of the kitten/teenage stage but she used to jump at the cages all the time and was such a viscious predator that we didn't want to chance her managing to break through the screens. Would have been delighted with those living strings!
While we were dating and my husband only had two snakes, he used Lexan to make swinging covers on the front of that one smaller rack, that Velcro'd down and blocked the sides with cardboard so the cat couldn't get at the tanks themselves. But once we got married and added my hoard, a room with a door that could be shut was the only really practical way to deal with that many cages!