He will employ 1/10th the labor.
Interesting. Do you have a link for that?
I forgot where I read that. I do remember the vinyard mananger saying he had employed forty people and would now employ 4.
An on line article that goes further in depth on the mechanization is at http://researchfrontiers.uark.edu/628.htm
That article says 50 to 70% labor savings. It also says that merlot grapes produced a better wine when compared to hand cultivation.