You can breed worms to save on costs; if you don't have a problem with that. I have. mayor worm-anxiety. Already proud I can handle dried dead ones. So I can't look it up for you; how to do it. But it is on here somewhere. How to build your own gross maggot-farm.
I also learned that with a wide variety; runners know for themselves what to eat and what not to eat. They generally leave plants alone here; especially poisenous ones; and only eat a tad of grass/dandylion/parsly (really safe greens). Males tend to eat more greens then females. If I set up a plate with meal-worms and one for peas; I can guess who is going to eat from which first. I also noticed from adopting runners and seeing runners at other breeders/hobbiests; the ones that only eat green/chickenfood; they are really thin and their feather have less of a shine. Some breeders use the "no-animal protien" diet before shows so that they are more skinny and appear more "long". It's technically just starving them.