I did the same thing. I added 1750 DPs to take us over the 15000 to 15050 and will have them added for the 2024 year, to keep my maintenance fee lower for 2023. I choose 42,500 Bonvoy Points to attend, applied for the Amex Card with the 100,000 Bonvoy Point Bonus and $300 annual account credit / 50,000 Bonvoy annual bonus certificate for the down payment which is part of 15 month no interest promo for new accounts. I will Finance with Marriott at 13.99% for 18 months to earn an extra 1750 DP bonus on top of the double bonus for buying now, 3500 DPs. Since there is no prepayment penalty on the loan, I will make a large pay down payment on it right away, but not wipe it out until after 18 months . Their funny math says all this lowered my blended cost down to about $7.13 per point . That is based on the 5250 total bonus DPs being valued at $2 per point , but I told them that I know I could just rent those points at leas then 75 cents each .In the back of my mind, I had wanted to consider getting my point balance above 15000 just in case more Chairman perks were coming at any time in the next few years, so we decided to do it . All in all, with the total Bonvoy add on of about 200,000 we felt buying from the developer was within reason in the manner that we did it. We also got $2000 off because we stayed at a different Marriott Hotel the week earlier (On 2, 35000 Annual vouchers earned from Chase Marriott Card). You get the $2000 off just by having a stay at any cost prior to your tour if it was within 7 days .