Kaye Appleman and her husband, Edward Mopsik, at the home they have owned for more than 30 years in Bethesda, Md. They are moving to a condominium nearby. Credit T.J. Kirkpatrick for The New York Times
FOR Dianne Welsh, 63, downsizing from her 3,400-square-foot home to a nearby two-bedroom bungalow did not happen instantly. It was at least 30 months from start to finish.