It can only succeed in the city taxes it as farm land. Industrial taxes on it will kill it. Retrofit of old steel frame buildings might have corrosion problems

It can only succeed in the city taxes it as farm land. Industrial taxes on it will kill it. Retrofit of old steel frame buildings might have corrosion problems with the water involved when the fertilizing salts are added. Concrete frame is OK. At the heart is the low cost of farmland and sun, compared to city land with LED lights. 24/7 grow cycle helps.