Just like with adult corns theres really no such thing as too big at all. The only thing they require is height over 16 inches since they are arboreal. A lot of people turn aquariums on end to make it taller and buy a fitted top. They don't usually use typical hides but love to hide in fake vines and corkbark tubes placed diagnally instead of on the floor, and bamboo. We keep our home pretty warm in the winter and cool in the summer good temps for them are 70-80 degrees so a/c shouldn't be a worry. In their native habitat it gets in the high forties at night in the cool seasons only heat above 80 is stressful for them.