A 32qt sterilite or rubbermaid tub from walmart would work fine.
If you know youre gunna want more bps and plan to breed i would skip getting a cage and just save up to buy a rack instead of a PVC cage. For now i would buy a 32qt tub for like $8 and keep your bp in that until you save enough for a rack. Even if you only have one snake or 2 snakes you can still keep them fine in like a 4 tub rack. I have this one from Reptile Basics and love it:http://www.reptilebasics.com/iris-sw...y-or-back-heat
Animal Plastics also makes some awesome racks. I bought an older used 10 tub model that runs on heat cable and it works like a champ. I love both of them about equally.
Like i said, if you are already planning on more snakes, just skip the cage and go straight for a rack lol. Because we know you cant stop at just one
So you would recommend the 32 qt tubs for a full grown female instead of the 41 qt? I want my female to have enough room to be able to roam like she would if she was in a tank. Is that even possible?