Tobacco is the crop I’m thinking of; gives you quite a return on each acre, though I don’t know the exact figures.
In high school (1970’s) a friend’s Dad gave each of the kids a 5 acre plot to grow what they wanted. Lin always planted tobacco. She had a new sports car each year once we could drive and her college fund was completely up to snuff before we graduated.
http://www.ryomagazine.com/july/review.htm
With all the tobbacco laws and heightening taxes I don’t know if that isa good crop or not given the current politics.
I think raising tobbacco is an opening for the government to come to your home to tax your crop.
Now if you grow it illegally you may succeed in the black market. But keep in mind the eye in the sky can identify all things cultivated.