If you have 20 or more ball where do you get your rats?

[blackcrystal22]

Here's a good side question: at what point (number of snakes) does it become more economical to breed rodents as opposed to buying them?

3 or more snakes.

I bred at two. I don't want to buy one of each size from a frozen bulk, so I make my own and use what I need when I need it.