Tom Reilly only technically a Watertown resident?

On H2otown, Lisa Williams writes she'll probably vote for Tom Reilly if he wins the Democratic nomination, but that she's getting tired reading about his humble Watertown apartment:

... Has anyone ever seen Reilly anywhere in Watertown? Doesn't Lehigh know that Reilly owns a house on the Cape? ... [I]t's not clear that Watertown is more than a storage shed and a bed to the guy.