Ok this is my experiance. I have one BP I got her in February, the only reason I am breeding my own feeders is because the nearest pet shop is 50miles away. She eats 1-2 full sized mice a week (in shed this week so not eating) Baby mice grow quick so one week you will have tons of perfect sized mice but in a few days they will be too big and you will be left with many, many extras. My bp did eat f/t for a while then she got picky and did not want more so now it is live all the way. I breed one litter of pups every few months to keep the population going. I keep one breeding pair, and the rest are seperated into a male cage and a female cage. The breeding cage is kept empty untill I am down to 3 weeks of feeders left. I have left the male with the female and babies, but I only do it when I need her to have many litters. I have never had a male eat any of the pups. If you do not remove the male before the pups are boorn you will have a new litter just as the first litter is weened. With one snake eating 1-2 mice per week, and a single mouse having 6-20 pups (yes 20 most of mine have that many at a time) Can you handle that many mice? If you breed 2 females at a time you will become overcrowded very fast. (I made that mistake in my first couple months)
As I sit now with many rats and mice I am spending $30-$50 a month in rodent food and bedding.
To be sure the mice you get are good for breeding, get 2 males and 2 females, keep them in seperate cages (males in one females in the other) for 1-2 weeks, if they don't die then you are good to go. Breed one litter at a time. A female mouse comes into heat every 4-6 days so leave the male with her for 2 weeks, if you do not want back to back litters remove the male. Expect the litter in another 1-2 weeks mice are only pregnant for 20-28 days, and come into heat again within 24 hours of delivery. When your pups are 3-4 weeks old they will be weened by the mom, watch for them to be eating solid foods and nuse less. be sure to seperate them into the male/female cages before they hit 5 weeks or they can and will breed. If your cages become over crowded your more dominant rodents will start killing off the weaker ones, so to avoid food compition.
I hope this helps
I learned the hard way
Jamie