i would go for locusts ahead of crickets,found that by trial and error too!They grow alot faster,bigger,if you don`t want them big feed them out sooner.All you need is a breeding cage,a rearing cage and a supply of fresh green grass,some breeders and your away.Cages can be as simple as a big cardboard carton with a heat source and acess hole/door to get your food in and out and to retrieve the ones you want .I have plastic coffee cups filled with moistened pumice sand in a shallow cardboard tray,these are changed for fresh ones once a week and taken away,covered and incubated for a couple of weeks.I have 4 rearing cages and empty one each week and start a new batch each week,all depends how many you need but you can sell surplus or even freeze them for later use.