i dont see anything wrong with breeding these things for feeders, its called the food chain not a natural one, but simalar to what they prey on in the wild..
you need to cycle that tank and i would recomend having a 30g spare grow out tank (cycled). as for the 10 gallon i would stock 2 males and 6 females, 2 males incase one is infertile, then a few floating plants, and some moss, and some liquifry and finely crushed flake, for when they can take the flakes.
remeber the tank needs heating about 26 degrees sounds good, and good filtartion for both tanks but ensuring fry arent going to get sucked in, and a few breeding traps would be good unless you transplant the female to the 30galon growout in a divided section and once shes done release the fry and put her back in the 10g,