What do you do when you no longer can afford your private assisted living, but have a $4000.00 fixed income? What is out there?

My mother has lived in an assisted living facility in Portage ,MI. for the last four years. She is on a fixed income that covered her monthly cost. Now her level of care has increased where she will no longer be able to afford the cost. Her problem is she has more fixed income than Medicaid allows. Who is available to guide the next steps? She will need a new location / facility by December.