I would suggest to switch into an appropriate sized tub. It would solve all of your heating, and possible humidty, problems and you would have a happy healthy snake!! And you really wouldn't need too much to get it setup. Just the tub, a UTH, possibly a new thermostat (not too sure about what you have), and then get some newspaper for substrate. Good luck with your snake. And make sure you have a waterbowl that is pretty heavy so it won't get tipped over.