I would think that the initial set-up would cost the most. Like Mark said, the caging can cost a lot, but it's a one time deal. (ideally) If your just planning out what you want for the future, go and talk to the guy, and maybe some retic or burm breeders and get a good idea of what you need to house and feed. It's something I would like in the future, but just because I'm fantasizing about one now doesn't mean I'm going to go and jump out and buy one tonight.