Holy moly - where to start
The good news is that you have some basic knowledge and you obviously care a great deal PLUS you mentioned you have money
In a few words as I'm just going into a meeting ..
You NEED a thermostat immediately to regulate the heat / heat mat . If it feels warm to you with a body temp of 98.4F it will certainly feel warm to the snake . Maybe in the meantime you can raise the tank off the unit using 4 pieces of slim wood or plastic plastic or something - just to lower the heat whilst leaving some heat there - maybe better than being too hot ?? Just a thought .
Also get yourself some digital thermometers off eBay 3 dollars each
Then buy a cheap digital temp gun ( fancy thermometer) for 10 dollars off EBay - no need to get an expensive one !
Other quickies - normal two water is fine by the sound of it but some do use comes down boiled water to be extra safe .
Also no need for any 'fake' light in my opinion ..
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