I think the move you're missing is getting in on the ground floor with a solid ownership share to an experienced coffee grower. A 51/49 ownership split or a similar arrangement could be a life-changing opportunity for an experienced farmhand or manager. (Of course OP will not be able to tell the sharks from the real helpers and this would still be a gamble unlikely to pay off--it just could also be an incredible life experience that assists in later success.)

I would say that if OP has a family and isn't already loaded, sell outright, but if they're younger and willing to go through hell they definitely should try to be involved in growing coffee beans.