I assume the people who randomly inherit coffee plantations actually are the people with money to spare to learn the trade. To that end, I'd say that the OP sho

I assume the people who randomly inherit coffee plantations actually are the people with money to spare to learn the trade. To that end, I'd say that the OP should go to the area, find profitable plantations and try to get sit downs with owners and operators. Learn what you can, try and hire the best operator you can, or someone they recommend. Profit share with the operator and let him run it while you stay out of the way and/or learn the ropes from him - possibly by doing shifts in all of the roles.