The bigger question that comes to mind for me is what kind of snakes do you plan on brumating? Some snakes can easily be bred with slight variation in temps and/or light cycle fluctuation. But the easiest way to go about it with a limited budget is lots of insulation and utilize the outside temps when it is cooler. A fan that is capable of pulling in night time air hooked to a close on rise, line voltage thermostat (when the temps increase it turns on, and runs on 120 volts) is easily obtained and really a simple solution. The down side to this is that if your insulation is not thick enough you will lose your nice cool temps rather quickly. Something you may want to consider is a wine cooling unit. They are miniature air conditioners and can usually attain temps in the range that we use for brumation. I built a cabinet for a friend and he maintained 45 degrees all winter here in Vegas, inside his shop. You can even buy refurbished cooling units at a severely discounted price. Hope this helps,
-JT

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