I'm not in your area, but I went through this with my father a few years ago.
One tip is to check the inspection report and complaints for the facility. We eliminated a few assisted living/Alzheimer care facilities based on information in the state report. Some places had things such as falls not being reported to family members, blood sugar not being measured correctly/reported when out of range etc. For Massachusetts it appears you have to request each facility's report in writing. I was lucky and my state had the records online.
How to Request Inspection Reports in Massachusetts
Pertinent info from above link:
Massachusetts Assisted Living Facilities Inspections and Complaints
Inspections in Massachusetts are performed by the Executive Office of the Elder Affairs. Inspections are performed every two years. To request a copy of an inspection report or a copy of any complaints you can fax the executive office of Elder affairs at 617-727-9368. You can also send a written request to Maggie Dionne, Executive Office of Elder Affairs,1 Ashburton Place, Boston, MA 02108. You may also call to file a complaint or get more information by contacting the long-term care Ombudsman at:
* Mary McKenna, State Long Term Care Ombudsman
* Massachusetts Exec Office of Elder Affairs
* 1 Ashburton Place 5th Floor Boston, MA 02108-1518
* Phone: (617)727-7750 Fax: (617)727-9368
* Toll Free: 800-882-2003 (MA only)
If your father's health declines further and he requires skilled nursing care in a nursing home, reports for these are online here:
Nursing Home Reports (does not include assisted living facilities)
Note that an assisted living facility and a nursing home are not the same thing. An assisted living facility does not provide skilled nursing care.