I am off visiting my 90 year old Mom. Right before I left I read this article about very interesting Granny Flat structures -In The Backyard, Grandma's New Apartment
I am particularly taken with the units called PALS - Practical Assisted Living Units that are attached to your home either temporarily or permanently and provide direct access to the main home as well as outside.
Would you live in one of these attached to a child's home? I would.