I suggest you talk a bit more about the future: "Permanently affordable" needs clarification.

What happens is an artist buys a unit and prices go up and that person sells to another person? What are the material restrictions on speculative purchase of the units, if any, and what are the penalties for flipping, if any, and how can any of this be enforced?

Without seriously addressing these questions the assertion that this will be a "permanently affordable" community is hard to believe in a town that has seen so much owned property go up in value so fast.