That depends on what kind of scale you're looking at. Is this for personal use? or are you looking at resale? Either way, it's a lot of time, hassle and smell, heh. It would probably work out cheaper to just buy them by the thousand if you're needing that many. We usually buy about 2-5 thousand a week. Trying to actually reproduce them, and raise that many ourselves would require an entire average sized room, just to keep up with demand, and would be a LOT of upkeep to prevent them all dying off.
It's a lot of time, hassle and smell. It would probably work out cheaper to just buy them by the thousand if you're needing that many. yours, zyra Simulation pret immobilier
I am trying this ATM, here is a little guide that should help you it's by someone that sells them so its bound to be made by and experienced person. http://www.wormman.com/breeding_crickets.cfm