This is true as far as it goes, but it doesn't consider opportunity cost. Instead of building special units that would benefit 4,000 people, a tiny fraction of

This is true as far as it goes, but it doesn't consider opportunity cost. Instead of building special units that would benefit 4,000 people, a tiny fraction of the Bay Area, cities could charge an equivalent general fee that benefits everyone. The money could pay for mass transit, parks, services for the poor, programs for children, and so on.