Conserve/preserve Tomato, Chili, and coulee flower of huge quantity for Six Months (Please read details and)?

I know of no way of preserving tomatoes or chilis for that long to sell fresh, but the cauliflower will keep for several months in a root cellar. I'd try just a few before I trusted it for the quantity you're talking about. If they don't need to be sold as fresh, the peppers can be dried. Even with cold storage and picking under-ripe, the tomatoes would suffer. Sorry...