A couple left Miami and downsized to a tiny home in a Georgia forest. They found happiness through building more tiny homes in their backyard and renting them on Airbnb.

• John and Fin Kernohan are Airbnb hosts who rent out eight units in their backyard in Georgia.
• They live in a tiny cabin on the property and built a community around tiny living.
• The tiny firehouse, tiny houses, yurts, and domes that they rent out range from $99 to $148 a night.

In December 2011, newly engaged John, 60, and Fin Kernohan, 44, decided to leave their city lifestyle in Miami behind and move to Georgia. John had recently sold his medical-research-lab firm, and they wanted to live a quieter life.

While John was happy to join Fin on this adventure, he wasn't prepared for what she had in mind. "I knew she wanted to downsize, but when Fin was talking about a smaller house, she meant really small — 304 square feet," John Kernohan told Insider.