You are right, there is no exoterra large enough for a full grown veiled. But for younger veileds they work great. There are lots of other options of partially glass cages that are larger. I don't think the climate that you are in matters so much as I know people here in new orleans who keep their houses like 65 degrees all the time and people in the north whose houses are hotter. Its just how you regulate the temps and humidity that matter.