To move or not to move, when you retire — that's a big question. If moving seems sensible, then where? And what will it cost?

The vast majority of new retirees plan to stay in their own homes. But circumstances change. You might be widowed, your spouse might get sick or you simply might get tired of having to find someone to clean the gutters and make repairs. Over 12 years (1992-2004), 30 percent of the home-owning cohort born between 1931 and 1941 pulled up stakes at least once, according to a 2009 study for the Center for Retirement Research at Boston College