Many Real Estate investors start out investing in residential properties before migrating to asset classes like industrial, self-storage, or office for less day-to-day management. Jonathan Hayek, founder of Endurance Properties, started with single family houses and small multifamily properties before acquiring a vacant office building in Cheyenne, Wyoming. After he realized that small office buildings can also be high maintenance, however, he sold that property and recently acquired single tenant NNN industrial properties. With NNN industrial, the tenant is responsible for everything except for the roof and structure. They pay all expenses including tenant improvements, taxes, insurance, and utilities, making it true mailbox money.