Here's the $30 thermostat http://www.amazon.com/Hydrofarm-MTPR...4920589&sr=8-1
Although they've been shown to not be highly accurate, a lot of people use Accuright thermometer/hygrometers. I think it's +/- 5 which isn't horrible but isn't the greatest. Highly accurate ones cost a lot of money, so people (including myself) generally settle for these. It will read both sides as it has two probes. They can also be found at Walmart or Home Depot and the sorts. http://www.amazon.com/Chaney-Instrum...1&sr=8-1-spell
I wouldn't go with analog...
Congrats though and welcome to the forum! Not sure if anyone warned you, but don't be surprised if you become addicted. I had ALL intentions of only getting one ball python...it never works that way lol.