Jersey City is redeveloping a public housing building into a 631-unit mixed-income development that preserves 192 public housing units, adds 74 affordable senior units, and 28 affordable homeownership units. The plan’s success, which could become a blueprint for other cities, depends on its relocation strategy. “It’s hard to do this well, even with the best of intentions, which it looks like they have,” said Susan Popkin, senior fellow at the Urban Institute.