I planted a half acre of Merit sweet corn last saturday, cost me about 12 dollars for seed and I probably used 50 cents worth of diesel. I usually turn off about 400 dozen and sell most, freeze some and give away to friends. I sel it for 2 dollars a dozen and some of the people I have gave it to wants it pulled and brought to them. Old person, I don't mind but an able body I figure if I go that far they may want it cooked next time. I have 4 wells on different properties that I wish I could give you because I'm gonna have to fill em in eventually. They are hand dug and host plenty of water but I have city water and the wells are in my way. I am gonna convert some of my garden into goat pasture this year, its just too much blame work. I have about an acre that I'll keep to plant just because I like watching things grow. In all reality, I think you can buy local produce from farmers cheaper than you can grow it if you count your time especially. You have to like doing it. That sounds like a heck of an irrigation system for an acre and a half. Well drilling must be very expensive. Good luck on your garden.