She is unemployed, she has said she hasn't taken her medications, and has threatened to commit suicide. I do not have transportation. I am unemployed, and I am worried about my Dad. He needs a place with assisted living and I have made many calls, no availability, we don't have assisted living, etc.
Many local resources are also listed in the telephone book. Yellow pages list businesses and nonprofit organizations under many categories. Resources may include independent services, and some hospitals, that have outreach programs to go into private residences to help with daily activities such as cooking, cleaning, personal hygiene, bill paying, and other paperwork. In some communities, volunteers, such as students and members of religious organizations, perform these kinds of services. Organizations such as Meals-on-Wheels also can help you care for your parents in their home. The blue pages, available in some telephone books, list federal, state, and city government offices that may also provide information.
As for your sister, the next time she says she's suicidal, call her police department and ask them to check the welfare of your father and her. They can cart her away to rehab and they will take care of Dad too.