David Holston, 18 years old, owns a landscaping and snow plowing company in Idaho. He was visiting his mom in the Seattle area for her birthday, and he brought along his plowing equipment thanks to a friend’s suggestion. He took an ad out on Craigslist offering his plowing services after a snowstorm hit and he made $35,000 in four days by charging as much as $750 an hour to plow during the storms.