The college football world has changed, those days are over. If you expect him to be a legacy you will be disappointed. He will go where the money takes him and possibly play for 2 different schools.
We certainly agree that those days are over.
But for Marshall, the money would only be a factor if he had
no plans to play in the NFL. And even then, he could forego the NIL money just to free it up for his chosen program to surround him with better players.
If the NFL is his goal, he will go where the coaches and system best prepare him to be successful at the next level. If he sees several options that meet that criteria, I would guess his next criteria would be best college experience--including classroom, setting/location, and appreciative fanbase.
But your third point is also intriguing. If your top goal is to arrive at NFL Draft Day as fully prepared as possible... might one choose to play for two different offensive coordinators in somewhat different systems?
I pose that question assuming that Marshall would have absorbed his father's head-knowledge about the game from the QB position, and would see college as the opportunity to gain on-field knowledge. Of course, in my ignorance, I may be totally underestimating the challenge of executing even one college offense with proficiency.