All I can say is research. I'm a wedding photographer and it is really difficult to come up with pricing. A lot of time is spent figuring out overhead, how much time will be spent meeting, editing, and any other photo process, and how much your art is worth. All in all I make maybe minimum wage - $11 an hour.
WSDA defines a small farm as one where the farmer or farm family participates in the day-to-day labor and management of the farm, and owns or leases its productive assets. Merriam-Webster defines a farm as a : a plot of land devoted to the raising of animals and especially domestic livestock.
Solar farms (sometimes known as solar parks or solar fields) are the large-scale application of solar photovoltaic (PV) panels to generate green, clean electricity at scale, usually to feed into the grid. Solar farms can cover anything between 1 acre and 100 acres, and are usually developed in rural areas. Solar farms go through a rigorous planning procedure before they are approved. This takes into account the suitability of the specific site, any potential impact on the area and relevant renewable energy targets.