As a general rule, it's a good idea to invest in real estate. That's especially true when you can get into an expensive market like San Francisco or New York City early, and hold onto the property for a very long time. This is the case of the Swig family. An under-the-radar family that quietly owns billions of dollars in real estate across the United States. Benjamin Swig was born in a suburb of Boston in 1893. His father, Simon, was a banker and politician. In 1936 Benjamin founded The Swig Company. One of the flagship buildings Swig and his partners purchased in New York City is the 50 story W.R. Grace Building located on 42