When I move in a few months, I will be living with my gramma who has a cat. SO I'm trying to think of someway to make a catproof cage for my pigs. I was thinkings something like this. But with three levels instead of two. THat would be about 23 sq ft, right. I know technically the ramps take out space, so more like 20 sq.ft? Do you think it would work for my four boys, or should I continue the search for a good support system for a lid for my 4X5?