I've seen alot of threads on this site about making a wizard island. I actually have detailed plans that I've been working on for a realistic wizard commune. The features would be:
Never have to talk to another person in the commune
Every living space is separated completely from others
Food would be cheap, as low as $1/day (possibly lower depending on a number of factors) if a farm was made and $2/day without a farm
All electricity would be from solar, completely off the grid. Also every living space would have its own separate solar energy.
The main limiting factors of a wizard commune are location and money. The only country it would be cheap enough to work is the USA.
According to the calculations I have made it would only cost about $5,000 per living space and after that only food, water, and optionally internet would need to be paid for annually. The annual living cost of each wizard would be around $800-$1000. Post too long. Click here to view the full text.