i have to respond to this....
you are so blessed to be at the begining of this process....this is a dream for many people that will never have to resources to start but maybe join you after you are established....but you should be very comfortable with the other investors, you didn't say if they were friend or not but you should know that consensus works, it means that everyone is satisfied with a decision, if even one person dissagrees then measures are made to accomadate everyone....some people do consensus -1 for extreme cases but this is all from my reading and being part of co-ops.....
you should visit other comminuties and takes notes from them on what works or not...some communities are totally separated and make everything they need from scratch down to toothpaste....some communities are based on selling a product (Twin Oaks tofu) and are ok with going out into the local town to get what they need....some plan weekly trip to educational/cultural events.....
there is a intentional communities directory
http://www.ic.org/
so you can see how other communities are doing it....i definately think your children will flurish in this environment of cooperation and "roughing it" will bring a greater appreaction of where things come from, not just the store etc.
communities work because everyone realizes, "Why struggle alone when we can work together and do better for everyone?"....you just need to understand each others needs and set those boundries early, like private houses and common eating places so people have a privacy but are communal in all other ways.....i think homeschooling works best in these situations because all adults can help take responsibility, like me, i have a biology backgrond and i want to teach a science day for homeschoolers etc.....
i could go on about this forever (maybe it's the coffee) but i wanted to give you positive vibes, this is a every exciting time, relish it and do the right thing (try to anyway).....
i live near earth haven and from what i gather it works for some people just not everybody.....and i can't remember if you have to give all your money to the community or not....some communities do it that way....
i think living in yurts is smart....we built one 30ft on platform with water, elec and with raw wood....you can build one for under $5000 maybe less, for that big anyway, (i think my figure is right)....alas we never lived in it we left it for the farmer whose land it was on for him to house farm interns.....dh wanted to experience doing it.....you might try to check out sustaniable building materials, rammed earth, staw bale it's all very do-able and definately cheaper than building a house.....
sorry to ramble this is one of our dreams and remember more than 2 adults is considered a community and i've seen it happening in the same house in a town and working beautifuly, so the fact you have land.....gosh, go for it!
peace
macy