I spent one term doing tax returns for farmers in SouthWest Ontario (well, collecting their data for the computer to generate the return) back in the 1970's. My manager said "Farmers live poor and die rich", and that was often the case - they made very little from actually farming, but when they died and the family sold the farm, they were often wealthy as urban encroachment and the demand for more sub-divisions made the land quite expensive. Very few farmers that I met were actually making a lot of money -
enough to live on, but hardly enough to retire on. (although, to be fair, as I was quite new in the job, I got the low gross income farmers, so my sample set might have been skewed.)
I also heard this tragic story a number of times: farmer reached 60 or so, decided to retire, sold the farm, moved to the city, and died in less than a year. Without the daily routine of chores, etc., it seemed they had nothing to do, so they just withered away.