I have made CC cages. Walmart did for a while have the panels on their website but not in the store and using site to store it wouldn't cost you anything to get them. The coroplast, I got out the local phone book and called all the sign making places one day and was directed to a wholesale shop where I could get 4'X8' sheets for $10 in any color. I made the ramp out of a panel grid I bent up two sides so it had "walls" so the piggies couldn't fall out and I lined it with a small carpet square so it was easy to climb. As far as potty training you may be able to train some pigs to pee in one spot but they will still poop where ever.