A very difficult question. This depends on the land layout, the height of the water and the depth of the drainage channel, topography of the land, how much to excavate wothout ruining/removing the top soil, distance of the water from land, the water channel, stocking rates of fish per acre and so on. Generally speaking, a minimum of Rs. 50,000 per acre (excluding price of land) of Capital investment is required to completion of ponds and stocking. There would be the matter of recurring expenses such as fertilization, staff salaries, construction of chowkis, chowkidars and ration etc. This too depends on the size of the farm. As such working capital of Rs. 30,000 per acre per annum is required.