Is there any way that you can put the snake tank in a separate room where you could eliminate the air conditioning and possibly set up an oil filled heater to keep the ambient temps at least 77 degrees in the room.

I believe ideal temps would be for the actual room temp to be at least 77 degrees. The tank temps should be 81 cool side - 91 hot side.

I would be concerned that your snake could get an RI from the temps that you are keeping.

Maybe someone else will chime in here with more information.