I'll just give you what i did and is working well. They are reproducing faster than i can feed them out to my 1 cham by a long shot.
I have one of those sterlite bins a little over a foot long, foot high, and probably 10 inches wide or so. It is the slick plastic that they can't climb. I had them in a bin with slightly coarser plastic and they could climb the walls. I leave all the nymphs together with the rest. I got 100 mixed from nick barta(fullthrottlefeeders) which was more than enough. I also grabbed the cleaner beetles and put them in with the roaches. They eat poop, mold, dead bugs, old food, etc. I have not needed to clean their bin since i got them. My dubia never smell, aren't that messy, and are easy to deal with all around. I know a lot of people recommend flexwatt for a heat source. I am lucky enough to have a big closet next to my cham cage i keep my roach bins in and use a space heater on thermostat for about 80-90. Everything has gone well. I feed organic/washed leftover fruit/veggies, bug buffet, and frozen cubes of blended veggies, seeds, fruit, beepollen, kelp, spirulina. etc.
or try a bakery, breakfast place or someplace that goes thro a ton of eggs, they get them on the big flats.
