I've seen similiar round here, under the guise of organic/local produce/farming. They chew through willing starry eyed city folk who enjoy the time right up till they realise that they more they work the more they're expected to work, and the compensation for it is a joke, massively lower last I checked than the minimum legal farming wage.
Eventually, they leave, but there always seem to be more to fill the gaps. Profit seems to stay with the farm.