This is a great example of how to begin practices as we transition out of industrial civilization. It is also a great way to practice agorism and begin building a small piece of infrastructure for a post-civ world. Part of the post-civ perspective is utilizing the scrap parts all around us to provide for ourselves. It is a world of recycling.
An enormous amount of a population's food supply can come through growing it ourselves. In essence, this is a cheap, urban way to begin living free NOW.