H Ludi Tyler wrote:
I bet it entirely depends on what you're growing. If you concentrate on a lot of annual vegetables, as you might want to do initially as other plantings mature, you'll need to harvest every day during the growing season. Same with berries during the picking season. Stone fruits probably only a few months out of the year. And so on. For intensive annual vegetable production, farmer Eliot Coleman says about 2 acres is the most one person can manage and you still might need one or two people to help at the height of the season. With 100 acres in diverse crops, you might need dozens of helpers. And don't forget labor needed for marketing, packing, delivery (possibly) etc. Labor will be your biggest expense on a permaculture farm, I reckon. 
Yes, there is no question that labour is going to be the major input on the farm. But, frankly, to my mind, if you can't afford to pick it and sell it, even when that is all there is to do, something is very flawed in the economics of the food market.
Thanks again for your insight, and I will definitely be planting annual crops "in the meantime"!