bulding a Plywood habbitat

thinking about building a habitat for my ball. his current one is working alright but he is growing fast and I dont think a 20 gallon tank will last him much longer. so my quastion is what are the mattarials needed. what did you spend on your get up. whats the best wood to use ply wood partical board ect. how big did you build. Any websites that you used for help. im looking for somthing that looks nice but is fairly inexpensive. i just bought a new house so I dont have much extra cash laying around. pics would be great to :)

There's enough said about building racks or tanks in the housing sections of the forum. Melamine is mostly used. Just don't use pine or cedar.