Marriott provides discounted reward rates to all members. A week at a category 7 property costs 150,000 points, whereas a day costs 35,000 and two days cost 65,000. The optimum redemption rate is for a one week stay at Marriott.
You can buy travel packages with a 7 night stay at one property. Marriott offers a travel package with Southwest where credits are offered at 32, 48, 64, and 80 for 200,000, 220,000, 250,000, and 270,000 points, respectively. These amounts correspond to the travel packages with 50,000, 70,000, 100,000 and 120,000 miles. If you buy the 80 credit package, you are getting one credit for 1,500 points.