I would rather see you deal with this directly now rather than wait until something catastrophic comes along. My guess is that the county they live in has social services. So the first thing you would want to do is find out who could do a home visit. Different states have various agencies that may be able to help. The first call would be to the local community hospital nearest their home, and ask to speak to someone who is in the social work department. Brainstorming with these folks is an excellent way to zero in on what agencies and services can be available. Once you find the right agency — they will better be able to help you plan.