Hey wicked! I didn't know if you bought the Ferret Nation cages but I have built two cages for my piggies from Lowe's shelving unit. It's cheaper and it's pretty big.
This is my cage (w/ 10piggies in it which is pushing it a bit on space but they all get along). I had to cut a hole in one of the boards to attach a ramp to the 2nd level. They have access to both levels.
And here's my foster cage. I have 2 piggies on each level.
I hope these help. I know I got this idea from someone else on here w/ a rescue. I like them because they're alot more stable. Good luck.