Honesty, I would get a pvc enclosure and give the gentleman at pro products a call and ask about their RHPs. Explain to him the temps you would be keeping the snake and see if he would have a panel that would work for you. I forget his name, but he is very helpful and would give you some legitimate information on keeping temps in an enclosure based on your ambient house temps. The entire house caaaaant be that cold!
i also tend to think 50 degrees may not be 100% accurate. That’s freakin cold man!
edit: if you have a small room like a laundry room or closet won’t outlets, you could set up and space heater on a tstat