Mavuno greenhouses at wambugu farm they have cheap greenhouses An idea by Prof Khanjan mehta.He is a brilliant chap. l would also say they are cheap for startups

I think people get this green house thing all wrong. A green house is not a magic wand for farming. You still have to put in a lot of work, chemicals etc. Don't forget that weed and pests also grow as fast in greenhouses. Green house quality seeds are also expensive and they require a lot of delicate care. You have to be nearby and have at least 1/2 acre to make some cash. But that's just my opinion and it's from experience. That said, there are people who have perfected this art. By the way if you are near a river (which I doubt), greenhouse fish farming will make you more money and is less costly.