I had this same predicament a few years ago and based upon experience applying a zoning mentality to this kind of vision is the sanest approach, for me at least, cause they depend on a zillion factors specific to you and where you are that you will start to solve only when the jump from dreaming to action is made and applying permaculture design is always the best way to go ;)
Find a core, a zone 0, your home and center, define the principles which will determine everything and be very honestly crude with yourself before involving other people and what kind of community you want to create and be a part of, whats acceptable for you and what not? include the time factor and if its going to be a life long term project generate the necessary filters that you need. Start with yourself and create a design that works for you and this will dictate a framework that will attract the right people if that’s the case. Also know that the bigger the group, the site, and the intention the more you have to consider and solve, but hey that’s part of the fun too.
By doing this you will also narrow a bunch of technical aspects that will solve almost by themselves. Like with zoning you start expanding from that core out and solving with good design the needs that start sprouting to then start interconnecting them: from land search filtering (in my case I don’t like the cold and a tropical warm setting was a must for me) to budget (do you want to deal with the maintenance of a big site ie finding And generating more resources? Just the fencing factor for example exponentially grows with the size of the property and this will determine the budget too) to every other aspect.
In any case, jumping into it is always scary but usually its all that’s required.