I'm planning on getting three, and don't really want to go to the rack system yet because the total setup is more expensive, I'm sure in the long run it would definitely be worth it but I just don't have the money for it currently (I plan to make tubs for each ball python). I plan to keep all the pads at the same temp though. Thanks!
Edit: I did look at the herpstat thermostats but they are a bit out of my price range at the moment, do you know if they make any cheaper ones int he 50-100$ range?