> It sounds like you're rich?

Not necessarily. He doesnt have to be rich, all he has to be is mediocre smart. Not apply for credit cards everywhere, burn wholes in his credit, drive recklessly, get in trouble with law, change job like gloves, etc; in other words: be a normal, decent citizen. Then his credit will keep building itself up, and yes every bank will be begging him to take the loan with them, knowing that at the end of the day the mortgage is bank's property until last penny is paid off, so there are limited ways he can "steal" it.