Best U.S. markets for buy and hold duplexes

[Jon Wright]

Hi, I am based overseas and want to invest in real estate back in the U.S. I am most interested in a buy and hold strategy for duplexes. I own a home in Denver, CO and have family in the Tampa, FL, Shepherdstown, VA and Plattsburgh, NY area. I would prefer to invest in or around these areas where I have a familiarity and a connection so I can get help when I need it. Does anybody have a recommended geography from the locations described above where I am likely to find better cash flow and appreciation over time? Thx.