I know this is an older post, but wanted to say that breeding a Dubia roach colony is extremely easy. I live in an apartment and have a colony of right around 500 and growing. Just pick up an 18 gallon Sterilite bin from a store, cut a medium sized square in the top (mine is 10" x 10" roughly) and hot glue a little piece of screen over the opening. I have a 60W red heat lamp bulb in a little Fluker's ceramic dome resting directly on the screen, turned on 24x7. I've got a dozen egg carton crate things stacked vertically inside the bin, just underneath the heat lamp, that takes up 3/4 of the space. The other 1/4 of the bin I keep filled with carrots/veggies and Fluker's water cubes. They seem to do just fine with that setup, I have yet to need to clean it out and it's been going for about 5 months now.