Well for an enclosure, the bigger the better. These guys need good ventilation to and screened enclosures can work well if you are able to keep the humidity between 50-70%. If you have trouble keeping humidity up in a screen enclosure you can put up plexi-glass on the sides and back. Spray the cage twice a day to help with the humidity. Chams also get their water from dew on leaves and will not drink from a bowl. A basking light of about 85 degrees is good. The rest of the cage can be kept at 75 degrees. These guys are live breeders but should be kept one per enclosure unless you are trying to breed them and then only if the female is receptive. Anyways this is just the basics, I suggest doing plenty of research first.