With all the foreclosures etc these days I would imagine if someone was willing to do the legwork this might be a good time to start some new communities. Look for a street with a bunch of foreclosures and offer to buy them as a group. If you could get 15-20 families to sign on you would have in instant community. Of course you would have to build a shul/mikva and school etc but it could be done if the financing could be found.
This does require finding a bunch of families willing to be pioneers, I don’t know how hard they would be to find