Who has a roach colony? I want to start one. I like them...

My plan is to start out with 10 females and 5 males. Also, I'll have 300 medium nymphs, so I'll be using the smaller of these as feeders and moving the larger ones to the breeding tub. I'll be buying more as needed for feeding/breeding purposes because I know it takes awhile for them to start producing. How does that sound? Or is that a terrible plan??? I don't know because I've never bred them before. Lol