A friend and I daydream often about creating a ecovillege/communal plantation.
From scratch: If you're buying a totally undeveloped piece of land, and starting from scratch, a good idea would be to lease your property for a local logging company. Not all of your beautiful leaved friends, but enough to clear a space for garden, houses, etc. The supplemental income + having someone else clear all those trees would save some time.
Shelter: Depending on how many people are living in the community at any given time, more housing would need to developed, obviously. The second matter would be, are these individuals, couples, or actual families with children.
Actual houses would be reserved for whole families, couples could have smaller places (think townhouses-- 2-3 spaces per actual building, all with front doors, etc), and individuals could possibly live in dorm style housing (think single story apartment building, again each with a front door).
The issue with any of this would be fairness. Is it fair someone with a child has a bigger house then a single individual, regardless of work ethic? BUT, with hard work and enough resources, everyone could ultimately live in their own house (down the road).
Common areas: I think it would be a great idea to have a community area, both indoors and outdoors. To mingle, to relax, etc. Possibly a small library, art studio, workshop, etc.
Food: This is where it gets fun!
Grains, veggies, fruit trees, culinary herbs, nuts, etc. Have a few livestock: work horses, riding horses, milk cows, cows, chicken and pigs for meat.
Energy: I'd say this is mostly dependent on the climate in which the community is located and money on hand. Obviously a renewable resource - wind, solar, hydro, soy oil (or, cannabis oil?), methane(?) - or any combination.
Human waste: This provides the biggest head scratcher of the equation. With enough money and labor, the whole community can be constructed. What to do with the daily pounds of liquid and solid waste that each human expels?
Sure, you can bury it once it's sit for a while, but what to do until then? Burning it isn't very eco-friendly. You could possibly use the methane as a power source, charging battery cells for later use, but who wants to have that job? And again, that would probably cause some type of combustion, which isn't very eco-friendly.
With enough initial start up funds, and enough dedicated people the entire community could be build in the matter of 6 months. Something near the equator would be nice!