Counter argument is to take 1 year off, do a cheaper vacation, take all that money save it, and the following year buy yourself a nice contract without financing. Another option is to rent
DVC which is likely cheaper than tha AOA suite especially now (if I was renting I would be looking for $10-$12 points in the coming months might settle at around $13/$14). Final option is to do a Disney Springs hotel for the single trip.
Again people can do what they wish though. For all I know your grandma might be 78, your parents 50th is during the trip, and you are proposing. None of those are financial considerations which people respond to.
Financial considerations vs other factors will lead you to a final decision. Honestly I personally think now is easier than ever to choose an alternative since resale I feel will just keep dropping in value and there is going to be lots of loaded contracts possibly for sale in the coming months.
The OP I know is looking to buy sooner now though so they can pick up a 100 point direct contract before the min raises. That changes the math as well since buying an extra 25 points direct likely covers any finance charges if you are aggressively paying it back quickly.