Speaking to people who know the Smith family, they all confirm that Marcus is a sensible lad supported by well grounded parents.
I'd be very surprised if he would 'chase the money' so early on in his career, especially as he is still close to his family, who i believe are guiding him at this stage.
Who knows if a few years time, when he has a manager and he takes more control of his decisions, he may want to move.
I don't believe he will get any where near as much game time this year, which may have an influence ?
He's a Quin for at least 2-3 years.