That  might have worked in times when family all lived in close proximity to each other.  Also we didn't live that long.  Do you understand what is involved in caring for an Alzheimer's patient or other with decreased mental capacity?  It isn't like the Waltons sharing the farmhouse  with grandma.  In any event what might have worked 100 years ago but it won't work now and certainly in Alaska where many "family trees" have very few local branches..  My wife and I moved my mother from Washington state after she had a sever stroke. She lived with us a couple of years before she died.  That stroke changed her personality and she required somebody to be with her except at night.  I appreciate those last years with her but you might want to walk in the shoes of a family caregiver for a seriously disabled adult before you offer such a glib solution.