I wouldn't house 2 snakes of the same type together let alone different types. I would buy a plastic tub or 2 at a BigLot or Dollar store instead. I would probably order heat cable and router or by another method recess a path on the bottom of the old cage for it. I wouldn't use flexwatt or a stick on uth on wood. While I waited for the heat cable to arrive I would use a cheap red 40 watt party bulb from Walmart in a short lamp outside the cage.