Robert Applegate has some interesting ideas on cages.
https://www.amazon.com/General-Care-...bert+Applegate
IMO, the bottom of a set of cages should be at least 2 feet off the floor. Because a cage on the floor is hard to heat. And kneeling to clean a floor-level cage gets hard on your knees and back real quick. And someday a cage set will need moving, so care must be taken to make it small enough to get it through a door. One dimension should be no more than 28 inches.
Good luck.