Last year I spent $75 on materials ( cotton burr compost, rice hulls & peat moss). Went to Price Cutter in June to get the prices of the product I planted. Cherry & regular tomatoes, green beans, jal. & bell peppers, lettuce, spinach,sugar snap peas, green onions &cuks. I kept track of every picking & the total value the stuff came to $270.44.
Good return on investment plus, very little weeding & really good food. A raised garden is the way to go.