The 30L you're using, same footprint as the 55... which I originally was going to use. So, will most likely do the 20L. This way, I can learn a bit on regulating everything, learn how the snakes act and re-act in the tank and environment, and just "overall" get some experience under my belt. I do not intend on staying in the 20L. Whether I go with a larger tank or a PVC enclosure, I'll hopefully feel more confident in the choice I make then. Right now, especially with a smaller snake, it wouldn't seem right to spend all the money and not know what I'm doing.

Thanks for the input.