Billionaire Elliott Kantor, who ruled over a mammoth real estate portfolio in Chicago, was a creature of habit. His trainer came to his house three mornings every week for a five-thirty workout. By six-thirty he was in the car and his driver drove him down into the city where he'd get a shave and trim from his barber every morning, then head over to his offices on Wacker. He always ate breakfast at his desk, had two young assistants who tended...