I breed my own crickets....well, sort of...
I buy several thousand adult crickets a week and I place layboxes in with them. I replace the boxes every other day. The eggs hatch out in about a week and then the real fun begins. Raising baby crickets is a chore. But if you get the hang of it, you can save yourself thousands of dollars a year on your food bill. I know I do, as I no longer have to buy small crickets. Im getting ready to move to a place with a large detached building and plan to breed crickets on a larger scale at that time. Keep in mind that breeding crickets for a handful of herps is impractical. It can be alot of work. However, if you have hundreds of hungry mouths to feed the work is well worth it.
I learned how to breed crickets by following the instructions in this article. The only thin I really changes is that I do not use cardboard boxes.
http://www.chameleonnews.com/year200.../crickets.html
Don Wells has a wealth of lnowlege relating to herpetoculture. If I remember correctly, he helped invent Miner-all too. Very nice guy and not shy about sharing information. He recently moved to Indonesia and is breeding large chams and other herps.
If anyone has any other advice about breeding crickets I would appreciate it if you would share it.
Thanks.