You might look at the link below, it's a lightweight cage, easily knocked down and collapsed. I did make some modifications such as a removable plywood floor and 1/2" hardware cloth for the top to support heat and fluorescent lighting. It's an open screen style cage so heating can be tricky. I keep my herp room heated so it wasn't that big a problem for me. I also used "nylon chicken mesh" for the screen sides. I found this at Lowes it's green and tough as nails. Lots better then the nylon hardware cloth pictured.