1000.00 to 10,000.00 or etc., depending on what materials, how big and how much you want to produce. For a family of 4, 50,000.00 low cost materials is about it, savings approx. 2,000.00 a month payback 2 to 3 years. Tilapia is the best sustainable fish, you can try ornamental fish and koi..pangasius, gourami, hito??