ORLANDO, FLA. — Robin Boyle arrived in the Florida Keys two years ago, enthused about her new job and new life in paradise. Now she’s moving to Michigan. She imagined that she and her husband, who lived in Key West in the 1960s, would enjoy a slower pace before retirement. But the couple couldn’t afford anything more than a trailer or apartment. When her husband’s medical emergency required a two-hour helicopter ride to a Miami Beach hospital, she knew it was time to go. ‘We thought we would love it,’ says Ms. Boyle, who is giving up her job as managing editor of the Marathon/Big Pine Free Press in Marathon, Fla., for the same job at a newspaper in Hillsdale, Mich. ‘We just can’t afford to live here, but that is happening everywhere. Even doctors can’t afford to live here. The whole middle class is leaving,’ she says in a phone interview. In a state where growth is booming, the Florida Keys are losing residents. Monroe County, which comprises the Florida Keys, lost population every year between 2000 and 2005, dwindling by 4 percent to 76,329 residents, according to the US Census Bureau. By contrast, up […]