Average Greenhouse CostHere is an example of the average cost of a greenhouse to be built, based on an easy google search: For the Serious Grower About $13,000 to $25,000 The average cost for a greenhouse structure (except for kits) is about $25.00 per square foot. These large greenhouses are 500 to 1,000 square feet. They usually have all of the amenities a plant could hope for. HVAC systems maintain temperature and humidity for some, while computers and sensors automatically open or close roof vents and windows. Automatic watering systems and feeders provide nutrition, and grow lights help provide optimal conditions. Flooring is often poured concrete with drainage systems. These greenhouses should be professionally installed. https://www.homeadvisor.com/cost/outdoor-living/build-a-greenhouse/ To build 200 of them would come out to $5,000,000.00.... And your response, Radar? In my opinion only. Thanks-Buda.