I don't have exact numbers, but it's enough so that Farm Credit won't lend you money. They'll look at your situation, and they'll send you out the door. They'll say that there's no way you could even pay it.
As with my situation in dairy, you need to have something given to you by, most of the time, your parents, or perhaps you can find an older farmer who's generous enough to work something out with you so that you can gradually pay him. But as long as the farmer who's selling wants full value for his farm, a young farmer cannot buy it, in the case of dairy specifically.