I spent 175$ and built a full 3 wall melamine, 6 tub, 41 qt rack with heat. It's something that would probably go for 400-500$ according to manufacturing standards. Just a little 3 stack from Reptile Basics costs 300$(god knows what shipping costs are) with only 4" heat tape. It's designed to go in a heated room. I built mine for standard room temperatures by using 3/4" melamine and insulating the back. Also it has a 15" long piece of 12" wide heat tape under each tub to generate enough heat to keep the cool side at least 77 degrees while the hot is about 91 degrees. It's even on swivel wheels for easy moving. And the top is big enough for a 36"X18"X18" cage to sit on. It took some doing with many tools and probably 30 man hours between my father and I, but it was TOTALLY worth it to build my own. I'll have to post some pics on this thread later.