Get a sterilite/rubbermaid container and make a home similar to this one for one of the bps:
http://www.danielhillreptiles.com/pics/enclosure3.JPG
I had used that one for my first bp.....now I use a rack system. The enclosure will cost you about $10.00 then all you have to do is buy the heating stuff for another enclosure......tanks are too expensive plastic housing is the way to go

Here is a DIY article on how to build one:
http://www.ball-pythons.net/modules....warticle&id=40

Glad you decided to 'see the light'...your ball pythons will appreciate it greatly