As the title suggests, permaculture is an incredible food production and land management system.
It is self-sustaining in that once the water harvesting swales are created on contour, they will continue harvesting water which will re-hydrate the landscape (water harvesting) which allows a forest and landscape of edible and support species (food producing) to thrive.
The support species are "chopped and dropped" as they get bigger and this will help build soil which helps to grow food.
With permaculture established you will save MASSIVE amounts of money on food, and the food will be of the highest quality.