Built a rack and only spent 15 bucks. Well only that because I didnt need flexwatt or heat rope. 3 shelve rack for 2 adult ball pythons and maybe one shelve for juveniles. havent decided. TIP: Don't buy shelves from store if you can find them on craigslist or something. I saw a shelf that was $40 bucks and when I checked craigslist, the same shelf was 12 bucks. So BIG Save.