I have never used a rack system or a tub for that matter I have always spent money on expensive cages and felt a more natural environment was better for the animal, Reptile Tubs ( a company) has a very sturdy tub that measures 54L 20W 17H for 35$, I have heard you can stand on these tubs and they won't bow. It would cost me over 250$ to get a cage that is not even that big. I was also thinking as far as my hots go it might be better for them, less view of me entering the room ect.ect.ect. Do you guys think that would cause less stress on some types of hots, I know my westerns go crazy when the see me coming. Please give me your opinion on tubs VS cages Thanks Jason