Renting from Building Owners
Building owners can choose to earn a little extra money by renting roof top areas as Urban Farming venues. The roof top is usually dead space. Investing US$20,000 in hydroponic equipment and a green house for a 1,000 square meter roof can allow building owners to rent this out for maybe US$6,000 a year or US$500 a month. The US$20,000 can be recovered in just 40 months or 3 years and 3 months. At this rates, urban farmers growing tomatoes can earn a gross income of US$11,200 a year. They produce food for urban people and help reduce carbon dioxide in the air.
Alternatively, building owners can hire minimum wage earners to do the Urban Farming at US$10,400 per year costs, leaving US$6,800 year as income. In this case, US$20,000 can be recovered in 3 years. Using a 25 year lifetime of a building and assuming the green house can last that long with maintenance costs, at US$6,000 a year this is US$150,000.