Could This Help Rochford Meet Our Affordable Housing Crisis?

I often hear the argument made that we need houses that are affordable. Today I came across this article from the BBC which discusses a village which has been built by a private company, which is entirely powered by the sun. It's an interesting article and in my opinion is very thought provoking. It seemly addresses a number of issues when it comes to affordability, profitability and sustainability. The article suggests that land is released by the council exclusively  for affordable homes to be built due to the high cost of land. These developments could also see a 4% return on the investment. Perhaps our council would do well to consider this sort of scheme to help house our first time buyers and those struggling to get on the housing ladder?