Sorry for all the posts, got a lot of questions this week!

Alright I reached 10 animals and counting and I plan on getting into the breeding game so a room is deffinately the way to go. Its going to be 10x10, so nothing huge but not a bad start. But I'm wondering what you guys use when maintaining larger collections. I've notice paper towels are extremely cost effective but they manange to crumple them up and move them all around rendering them useless so should I use aspen, or nothing at all? Are hides nessacary once there in a rack? AND!! Would you say 41qt tubs are what I should build the rack around. I plan on having a seperate ling rack as well but that will happen later. Let me know your suggestions, I want this room to be as efficient as possible.