Antisocial Personality Disorder is also known as psychopathy or
sociopathy. Individuals with this disorder have little regard for the
feeling and welfare of others. As a clinical diagnosis it is usually
limited to those over age 18. It can be diagnosed in younger people
if the they commit isolated antisocial acts and do not show signs of
another mental disorder.
I'd say he has the definition just about right, are you the one that doesn't know what a sociopath is? The OP just compared keeping his "vacation" home on vacation mode to people that have lost everything and implies it's the same thing and reasonable. Lack of empathy is THE key aspect of a sociopath and the OP demonstrated it in spades.