No Thank You, you have no idea how often i see people try and keep numerous snakes with just dimmer switches. It just gets too difficult to have any consistency and especially when the room temperature chances, then your really in trouble.
Spending the extra money now will help you down the road. And then just keep dimmer switches for when you need to set up a quick quarantine tank for your collection, then when ready, just plug on in to the Ranco and viola, another cage!