Roaches are very easy to breed. I just keep them in some of my spare glass aquariums since they still have UTHs attached to them from back when they housed geckos. Since a lot of of the feeder roaches are tropical species, keeping at a temp of about 90 degrees will help them reproduce more quickly. You don't need any substrate, just egg cartons will do. And then every month or so, sweep the poop out with a small brush. It doesn't stick to the tank like cricket poop does, so it's really easy to do.
Mealworms are the next easiest to breed but they take extra time. After they molt into their alien form, it's about another week or two before they become beetles. Then it's another 2-3 weeks before the beetles die. Another month or so before you start to see baby mealworms, and then another month before they become large enough to feed your geckos. You just need to order a whole bunch of mealworms--more than your geckos can consume in a month's time. Then they'll start pupating on their own. Separate the ones that have pupated, and then BOOM. You've got a colony.
Progeckos.com has a great caresheet on roaches. And Leoloverslizardlounge.com has a good caresheet on mealworms as well as a nice gutload recipe.
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chickabowwow
