Prior to the real-estate boom of the 1980s, Francis J. Greenburger risked it all to buy three older loft buildings at 50 West Street near the current 9/11 Memorial. He ultimately dreamed of one day erecting a magnificent skyscraper in their place. But disaster struck in 2008, just as his plans were coming together, and development came to a screeching halt. The global financial crisis had made the land practically worthless and it would be years before he could get back on track, but he refused...