The major problem with something like that as I've seen it is that any arrangement or economy between people is inherently political, so the group would have to share a lot of goals and beliefs. Somebody needs to write a great book (or pamphlet) a few hackers could agree to get behind.
The core problem was diverse goals. The entire group each time (I somehow made this mistake TWICE) had a hard time coming to common solutions around the most trivial decisions.
Until you have something like a manifesto with a long set of explanations of what will be expected of everyone, you shouldn't even try to START forming the group. No more than a set of 3-4 friends should write the manifesto, either, or it won't have enough teeth.
And there's a downside here, too: If you're going to live together with a lot of people with shared rules, the one thing you DON'T want is a lot of cultural diversity, at least not before the rules are set down and the new "diverse" members have bought into them.
I've seen a community with strict vegans who wouldn't ever attend a meal where meat was served and other members who wouldn't eat if there wasn't a hefty meat portion. Now everyone gets their own kitchens, but the optional 2-3 times a week "common meals" were a strong way to stay connected with others in the community -- except in that they were also a source of conflict, for meat/no-meat and other reasons.
tl;dr: Living together with (say) 30 other people is somewhat like being in a marriage with 30 other people, only with fewer benefits. At least in most such communities.