> I wanted the people here to take a look at the numbers and let us know their thoughts.

But you haven't said anything about the cost of the Escalade buyoout.

> he thinks it is a bit young (probably because I have one, and it has wide wheels and tinted windows).

Make sure you are not trying to get him to buy a car you want/like, rather than what he wants. Since you have an X5, I would think it would be really straightforward to let him drive it and decide for himself if he likes the vehicle, vs. Cadillac lternatives. But if he actually likes Cadillacs better than BMWs, let him buy a Cadillac.