C'mon - What it boils down to is that the boy HAS a good FICO, a good job and great parents.
UNLESS you see any "danger" of him being shipped to the moon LOAN him the $$.
My parents and grandparents did it for me in the '70's. A few thou for car, house, etc. All at interest rates of what they were getting in their savings bank where the money came from. All paid back quickly.
We've done the same for our children. Agreed paid back time, family deal on interest (Although it did get a little ridiculous when savings rates got down to < 1%).
My daughters husband has been a quick payback type guy - We've been "loaning" them for house, car, house addition, etc. (probably ~50K all told over the last 5 years) and EVERY darn time he feels they have to pay it back quickly, and usually within a year.
Sometimes make me wonder why they bother to borrow in the first place.
So Sigarms loan him the $$, save him the loan fees and interest, and feel proud of it.