I used to raise feeder bugs for my reptiles but once they passed away I gave all my bugs away to some kid who had gotten an iguana.
I used to raise meal worms, crickets, super worms.
meal worms/superworms were easy nothing to it, I would put them in a large plastic pail fill it with 1/4 of the way with oatmeal and made my own gelled water with OXO packets, and placed in a small round pickle lid, for food I would give them round small iguana fruit and vegie pellets, which a small container would last me for months. the lid of the pail had tiny holes for ventilation and once I needed meal worms I would gently sift through it with my hands and get all the medium worms out, I left the larger ones in there because they were at the stage of turning into beetles. I never changed the litter because meal worms break it down very finely at the bottom and that is where the tiny almost invisible eggs were which would hatch and eat the tiny particles until they got large enough for larger food. I also never removed the bettles, they work on cycles and clean their own bedding, and consume the old shell carcasses. I would also sometimes throw in a few apple slices for extra moisture and lettuce, but after several hours any uneaten fresh food had to be taken out to prevent mold, as this can lead to health issues to what ever animals you are feeding the worms to.
Crickets are more tricky, I placed mine in a small aquarium tank, with a section of indoor/outdoor carpet that was always kept moist. or a sponge, this would be the breeding grounds where the females would lay their eggs, if the sponge became dry the eggs would die, so the sponge always has to remain moist but not wet. I used a spray bottle with a fine mist and misted once a day, one or two sprays was enough.
on the other side of the tank, I provided stacked egg cartons, gelled water, again in a lid of some sort and for food, the same pellets and foods I gave the worms. but they also really liked fish flakes, and alfalfa. I provided a black light or blue aquarium light for the crickets because it increased their breeding when they were mature. mind you for some reason I found that the blue light increased their singing a lot more.
I raised these insects for 4 years, I kept them in a dark and warm environment, otherwise crickets will die and the worms will be sluggish. when I say warm I mean about 70F.
Ema