When it comes to thermostats for multiple outputs, then your best investments quality-wise are probably the Herpstat thermostats from Spyder Robotics, which are numbered based on the number of outputs they can accommodate - 1, 2, 4, and up to 6. This works for whether you're managing individual heat pads for each enclosure right now, or if you're eventually planning to work with a rack system and heat tape once you've got clutches of hatchlings to house too.

https://www.spyderrobotics.com/index...=index&cPath=1