This is in the news now:
Some folks were ahead of the curve decades ago, the Historic Savannah Foundation, which started out with a similar concept in restoring historic (instead of foreclosures) homes, back in 1959. I wrote about this program before, but it is worth mentioning again:
That program is awesome, including the plaques people can purchase for their homes:
The before and after pictures are almost a miracle:
The key is the revolving fund.