Need help finding housing & care for mentally ill father.

Hello,

Looking for help & advice for finding housing & care for my 60 year old father who is mentally & physically disabled. No idea where to start.

My father has dementia resulting from years of alcohol & drug abuse, untreated manic depression and now he is unable to walk. I'm not sure how to gage the sevarity of his dementia but its mostly short term memory loss and has become incapable of caring for himself alone. Luckily he is staying with family in Long Island, NY for the short term and is not using drugs or alcohol, but is still a smoker which is not a habit he will ever quit.

What types of facilities should I be looking for considering his illness & history? What are the lowest cost options and higher cost options? He is already on social security disability if that makes a difference. Would like to keep him around Huntington LI where we still have family.

Thanks very much for any advice!