I think eco-based living is an excellent avenue to pursue. In looking at the plan, I think most of it looks like a typical TND development. It has a European flavor to it.
I personally think it will take 25-30 years to fully implement this plan based on it's scale, density, and location. Based on it's proximity to the Ecofina Spring, I think one of the biggest challenges will be keep pesticides, herbicides etc. from the garding operations from entering the aquifer in that area.
Here is an ecological thought, why don't they place wind mills/generators in the garden areas to harvest wind energy too.