If the OP books this as an event (with a contract) he will get 3points/$ for ALL the rooms and the additional expenses up to 50,000 points and 10 nights towards status that don't count towards promotions.

Notes/Ideas:

1. Pay with a Marriott Visa to get an additional 5points/$ and a night towards status for each $3000.

2. If you intend to spend more than $17,000 it pays off to talk to the hotel and book TWO events, so your accrual isn't capped.

3. Check the events page on Marriott.com - they run promotions periodically for DOUBLE points.

Congratulations for your wedding and best wishes for a happy life with your partner!!