I'm with ya. 8, 10 gallon tanks plus another sump can be a chore, with rotifers to grow as well, plus several display tanks, sheesh. I can be burdensome. For growout, I'm still sold on my 10's. I can do 100 per tank until market size and in the end I'll never get rid of ALL the fish I can produce (not enough demand, for tomatos at least), so I just breed a couple batches and let the others go bye bye until I can get rid of the juvi's, then repeat!
Have Fun!