I have this family member that is wanting to buy a Titan with the benefit of my discount. The problem is that knowing him the way I do he will bring a bad name to the truck. His idea of regular service is an oil change every 15,000 miles and then brag about it. He's already destroyed one Cummins and the tranny due to abuse and no maintenance. Then he starts badmouthing the vehicle. Not to mention when he starts tearing things up he will worry me to death. There are other vehicles that he has or is about to deal the death blow to. I know it's not my money(or his for that matter), but I take pride in what I recommend, repair, or build. What should I do? Or how should I handle this?