Freestanding commercial real estate is a goldmine of passive income.Commercial real estate is vital to everyday life. Most of us spend some time each week going to the grocery store, dining in a restaurant, or filling our cars with gas. Those routine activities require physical buildings to provide us with those goods and services. And these buildings are a potential goldmine of passive income hiding in plain sight. There's an estimated $14 trillion of commercial real estate around the U.S. and Europe suita ...