Hi, listen, all you have to do is find out what roaches you can buy make sure you have males and females and not just males, collect egg crates, get yourself a 85 l container, if the type of roach is a climber use vasaline and smear it all around the container(inside) the get yourself a heatpad and slap it on the side of the container, so you have your container with a heating pad on the side, then the egg crates to increase your capacity (more walk space), then a self feeding water container with cotton wool to make sure they don't drown,waterbowl and feeding dish is on the oppesite side of the heating pad, a cat bowl filled with dog food, milk powder and once a week bearded dragon pellets (top pet or t - rex brand).
Don't put the container outside, keep it indoors, heat plays a very important role in the productivity.
Then leave them
and only open the container once a week