I'm hoping this decision changes your life for the better. I understand that you are not so much afraid to live alone, but that your depression might get worse when he is in a facility, nursing home. But I can't say what's the right decision for you, but I can say that I think it's best for you to at least start with him being there for 2 weeks. In that time alone, treat yourself like you would treat your best friend. Be good to yourself.