The kid said he wanted to play in the NFL. There are trade offs to everything you do in life, but I think this is one I'd give serious consideration, unless he honestly doesn't think he could come here and compete.
Of course, if he can handle Princeton academically, and you'd have to think he'd have a great shot at starting up there? Wouldn't be a bad way to do your college years. We had a young lady working with us who quit to do an internship at Princeton, and her opinion was you just did not pass up any opportunity at a school like that (and she is German).
rtr