He is probably on medicare, so speak to the department of social services, we use the Services to People with Disabilities here in my state. We have many possibilities here also for the
older DS, A day care unit, nursing homes and residential facilities. Are there no group homes in your area? I am sorry about your sister, my daughter is also doing chemo right now for ovarian cancer, but her children are all adults now. You might also call the ARC in your area and ask for advice.