Is it possible? Yes

Do I recommend it? Not for the long term, I use this http://www.lowes.com/pd_70717-539-TT...d=3189447&pl=1 for QT but that is it.

Unless you have a room that has very stable temps YOU will have to do what a thermostat does for you, you will have to consistently adjust the temps.

So take that in consideration is saving the money really that worth it or would you rather have consistent temps and piece of mind especially considering how long your animal will live.