Not sure where this should be posted...

So heres the deal, After building a HUGE cage that according to the rat calculator can comfortably house 8 rats, I've decided to expand our little ratsy family.I have 3 girls comming from a rescue in a few weeks, and the last I'm looking to buy from a hairless rat breeder...I have found one, I was just wondering, what are some GOOD questions I should ask to make sure they are being responsible about their breeding program. I really hope they are responsible because I've fallen in love via pictures with a 2 month old blue hairless female... my heart flutters everytime i see it haha.