I can only guess at this stage, but after the pigs have turned and cleared the land, could you not use that ground for a veg patch, then after that re grass...
i am looking at making plans for our new place (if all works out) using pigs , goats , and chickens to clear and prepare the land for veg..... once the veg has been grown, i would rotate the next paddock or area,
like i said, i am only guessing at the moment,