Summer and spring is the perfect time to go grasshopper hunting. And I don't see them as hard to raise considering most eat wheat grass or romaine lettuce, along with wheat germ as dry food. They also eat fresh timothy hay.
They just need moist sand in a deli cup that is around three inches deep, some egg crates, and at least a ten gallon tank. Also need to be kept around like 90-95 degrees F. No need to mist them, just keep their plants well misted and they will get enough moisture.
Most breed in fall and the eggs hatch in spring. You can technically incubate them, but it's best to do it by generations. To make it shorter what you want to do is start the first generation off at normal temps and let them hatch normally. The second generation you can incubate them and make them a week shorter in hatch time and so and, and so forth until it takes only about two or three weeks. I would be careful with incubation because it takes a toll on your hatch rate.
Right now I am raising what I think is the Differential Grasshopper who have short egg laying to hatch spans already. They lay around 80-120 eggs at a time if I remember correctly.