Wanting to start keeping my bp's in a rack.

So Ive decided to start keeping my BP's in a rack system. I only have 2 right now but I want to be prepared for the future. I wanted to get a 4 or 5 snake rack that can house adults.
My first ball lucy is 2 years old and she pretty big but I just got a new guy named Butters who's only a few months old. I wanted to keep them both in the same rack if thats possible.
I wanted to know what kind of dimensions I'm looking at and tub size so I can tell my friend who's making me one.
Thanks!

32 qt is the biggest you will need for a male. Some people put large females in 41 qt bins. It kind of depends on the snake itself. I tried putting my female albino in a 41 qt from a 32 qt and she stopped eating. She really likes the small enclosure to feel safe.

You said you have 2 that are only a couple of months old. a 32 qt might be to big for them. I have some of mine in a 32 qt with a divider. They can stay in that for a couple of months before they woud get their own 32 qt bins.

My racks hold both 15qt and 32 qt tubs. Most young ball pythons feel way more better (lol) in the smaller size till 6-8 months old (varies alot) and then get moved up to the 32 qt. I did not move any of my females to 41 qt tubs till over 2000g.
http://i1115.photobucket.com/albums/.../DSC_07062.jpg
See how the 32 qt fit in sideways and the 15 qt fit in long ways. And these tubs are both sterilite purple handled from Target.