Hang on: Forget whatever I said. That’s not what I believe.
Ok. First: Scope. Is this shack, a house, a city block / commune, a neighborhood, or a bubble big enough to self-sustain everybody within it?
If it needs to be self-sustaining, humans need food and shelter. Food supply is a highly controlled regime. Grow-your-own is fraught with trickiness. Gotta think hard on that.
Shelter / land control is a little easier. Reclaim existing, etc.
Cooperation between diverse peoples can be tricky. Is there a law system to be put into place, even basic, to which agreement is helpful or even necessary? If so, what are those rules? Do they need enforcement or can they be ignored by the unwilling without consequence as part of society?
Hm.