I sadly do not have every one of them on display, I simply just don't have the wallspace or the want for to make that happen as much as it would be cool.
All my pets are safely stored in boxes and are sorted by species, I am currently in the process of placing them in small plastic bags to insure extra protection but that is going to take a lot of little baggies. These boxes are then placed inside my wardobe, whenever I need them I can easily ascess them.
I also have a ton of accessories and a couple playsets, I keep accessories in plastic ikea bins and the playsets I can't fit into those are place in a big box under my bed.