A lot of singles and DINKs like this sort of arrangement, but a community that has few or no children is dying, if not already dead.

Mobility is less of an option once you have children embedded into the community. Moving across the country is exciting and fun, until it means uprooting your kids. That's how a city, town, neighborhood maintains stability. Transients are not a long-term solution.

Cities chased out families with ever-increasing costs. This worked okay as long as business needed to be conducted in cities. That's no longer the case, turning our urban centers into glorified roadside RV parks.