Wantlove, I have a suggestion for you. If you really want some solutions. How about starting a solution journal? I have one right now. Tia and sgctxok have helped me write goals and I check them periodically to see if I am making progress on them.
It will help you feel in control of your life and like you are actually doing something to help the situation.
Everything happens for a reason, maybe Dad needs to find that it isn't better out there, he needs to realize how good he had it here. Maybe he will find God and that is the most important thing when he finds Him he will know he is supposed to come home.