Congratulations on the new job, new marriage, and new stage of your life. You deserve all the blessings God is giving you. Thanks for the encouraging posts for some of us that have been at this for a long while. It helps more than you know.
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.
