Great setup! I use a mix of regular cages, home made (big) tub creations, and tanks with wire tops (all the ASFs are in tanks though ).

I think I have close to the same views as you with how they are kept. I really love my rats, but I do have to have lines drawn on who are mostly pets (but all are interacted with). The ASFs are a bit different, but I still like watching them (they like to be left alone and I try and oblige ).

I just bought what looks like identical shelves from Costco. Because of the mixed caging that I have, these work out GREAT .