Congrats on that, I got that exact size last year. I keep my boa in that but my burm that is a year old still could fit into it. I would go one size up to the 6ft cage if you can, if thats what you want to keep it in forever. Or I am sure you will end up getting another snake you can keep it in there. As far as heating it goes, I use a 50 watt red bulb in the light spot and then under the tank on the back 3/4 of it I use one of those heat pad things that have the cobra on it, I am not sure what its called but you can buy it at pet co or pets smart. The temp there gets up to 100 degrees on it with out anything over it. Only in the middle of the pad though. I also tape the half of the back of it so the humidity stays up. I like visions they are easily cleaned.