Sup wild man !! I can tell you one thing. Those who maintence feed their babies, have them longer. People want to purchase FAT babies !!!! Yes, the ones you have longer you'll have more invested into, but they will be very healthy and you customers will be very happy.
I'm running 75-80 adult rats and have no problem feeding my hatchlings 50+ atm. with last years holdback and this years babies the only problem I have is getting rats to med size for the breeders.