From ArborWiki

The Housing Bureau for Seniors is a place where people, 55 and older, can find answers to questions about housing and care options. It is a community support for seniors and caregivers seeking advice or information on planning ahead, making transitions or handling a crisis. We can put you in touch with a comprehensive network of programs and services so that you can obtain the help you need.

Programs include HomeShare, for home sharing for seniors and their caretakers.

http://www.med.umich.edu/seniors/