Let's see...
I ordered 200 feeders and 12 breeders a few weeks ago.
I feed 7 adult leos (3 of those are gravid).
Even the gravid ones don't eat more than 2-3 mediums, or 1 adult male and one medium at a time, even at their hungriest.
I also have a chewie that I feed nymphs to.
Mine are still going strong.
Have you fed dubias before?
See, I keep my feeders and breeder in separate tubs.
This way I can allow my breeders to breed and only feed off my feeders. I know I'm going to have to replenish my feeders before my colony gets going, but that's ok with me.
I would start out with some breeders and about 200 feeders.