Can you not talk to the owner? That is who you really need to ask.

These are some of the things I would ask.

Next feeding day?
Interval between feedings?
Size of feeders?
Rats or mice?
Live, frozen thawed(f/t), freshly killed?
How he thaws them if f/t are used?
How he presents the prey? Tongs and zombie dance, lay inside, etc.
Do they have any quirks that you should know about?

None of us will be able to tell you this here. I can tell you that most snakes are fed weekly or biweekly, however some ball pythons can be picky and choose their own schedule.

Here is a caresheet for the ball.
http://ball-pythons.net/forums/showt...ius)-Caresheet

And here is one for the corn snake which is what the other appears to be
http://ball-pythons.net/forums/showt...ttata-guttata)