Do know that a lot of breeders don't end up making much or any money back. A lot of them just lose money by becoming breeders.
how do breeders lose money? this seems like a rather unlikely situation. equipment and animals are a one time cost. recurring costs of feed electric and maintenance is minimal. i can see if you are going big and renting commercial property you can go down the toilet but that's not my goal. i just want to do this for myself and make a little extra on the side.
You say you love animals so much, but also consider would you have the heart to cull deformed snakes or pre-kill your own rats for picky eaters? This is why I would have a hard time being a breeder.
to give you an answer if i could kill rats i would have to know how it's done. if it's with nitrogen i could do it. if it's by slamming them against a wall i couldn't do it. i understand some animals are fussy and won't eat pre-kill but almost all of these established companies have their animals eating frozen. even with my limited knowledge i know it's rare for a ball not to eat frozen. why do people kill deformed snakes?