You can very easily build your own cages, the problem I find with the cages used in the video (the same problem I ran into) is that you need to find a decent glass shop who can supply you with thicker glass. The stuff I buy at home depot works great for 4-6 foot snakes, but past that I just don't trust it. When I looked into making my retic cage the first thing I ran into was that the glass wasn't thick enough, and if he got hungry my cats were toast, and opted for hinged drop down doors and plexi. It wasn't expensive to build it either, building a decent sealed cage minus fixtures costs me only around $100 or less without too much effort, and it should last a few years if not more if maintained well.