Holy crap, you people are really serious about this aren't you? Okay, I'll play along. A few comments-
I don't where the idea of a Non-profit organization came from, but that's a lot harder to pull off than it sounds like. The better option would be to just incorporate. All you need is the legal documentation, and you can have a corporation that does absolutely anything. Heck, it's occasionally in vogue for gay couples to file themselves as a corporation, so they wind up paying taxes in line with married people. The corporation would hold all the pool money, everyone would effectively be an employee of same, all "stock" would be held in the group, taxes would be filed by the incredibly low small-business tax rate (might even get small-business assistance, provided we don't explain the company like it's a hippie commune), all kinds of tax-breaks on necessary company expenditures like vehicles, insurance pool breaks, and all the other stuff that goes along with it. People who work outside jobs could just live on the company's own property, nominally paying rent for legal purposes but basically just being well-paying freeloaders, if you get the idea. It's a little more complicated, but it winds up solving a lot of problems, with zoning-overoccupancy and taxes and money pooling and so forth.
I also propose that a very clear Membership Charter be drafted, preferably as early as possible, including provision for kicking people out. Allowing everyone to keep some amount of money and private property is absolutely necessary - as Vector well elucidated, people like having their own stuff. Their own place to sit around, their own books to read, their own clothes to wear, and the satisfaction of having your own money in your pocket to do your own shopping with. We are anti-social nerds after all, that's the whole reason we'd do something like this - the real hippie communes all fell apart do to human avarice, and they actually wanted to live like one giant family.
Regarding the property itself, more searching is necessary, but I have to admit the "buy some rural land and build a concrete fortress on it" plan has its appeal. Research research research I guess. Once again, the primary concern is making sure the area itself has enough employment and market opportunity to make enough money to keep everything going.