In order to keep any reptile, whether that be Iguanas, Snakes, Turtles, or other amphibian type creatures, the proper heating must be done for all.
Turtles need someplace to haul up on land. Ideally, a 50% land surface 50% water surface would be perfect. Make the water deep enough the turtle has to chase it's food and can swim around. They also require a heat lamp...I'm not sure of the watts though.
Snakes need things to climb on and a heat lamp, again....watts unknown. If it's a swimmer, again, a 50/50 type deal.
But, after the proper reading/study of your chosen pet, if cared for correctly, they can live a LONG time.
"Always be a first-rate version of yourself, instead of a second-rate version of somebody else." - Judy Garland