I just saved up. Anyone could tell you that they didn't just become a business right away. It all starts as a hobby. As far as how much, it depends on the reptiles, where the rodents are bought, and the specific equipment you use. You'd probably like at least 5000 if you're jumping straight to a business, but that doesn't leave a lot of room. Like I said... Most start slowly, but that's just them. I'm hopin' my first clutch ever hatches in 2013. I dig clowns just saying.