Enjoy NYC ... it is VERY expensive.
When I go to ANY of the timeshare resorts in NYC ... I pack instant oatmeal and powdered coffee cream .. my breakfast meal and before going to bed, snack. Eat take-away food from deli for lunch & dinner. I usually decide during the course of my stay, which local "sit down" place/eatery gets my money for my REAL meal.
When I took my elderly aunt .. we ate in every night ... she was too tired to enjoy eating out meal. But she did go once to a take-away only buffet ... picking out things she wanted... to eat back at the unit. And I got bagels frsh every morning for us.
Do not get a car/van for NYC (Manhatten island particularly).... drivers are unforgiving, MANY tolls, excessive costs for parking and then there are the hordes of pedestrians crossing everywhere .. with, without, and where ever plus the bike messengers. Pedestrians seem to all be POWER WALKERS and corner backers who cut in & out ... around you.
If walking as a group .. more than 2 people ... make sure, EVERYONE knows their way back. You will get separated ... the crowded sidewalks, traffic lights, car/cabs/bus dodging. And the noise ... hearing a cell phone ringing is hard ... texting might work but be sure "vibrate & ring" are both on.
But most importantly ... you are on vacation, to the Big Apple, with the family. It is ONLY money. Repeat again, every time you pay for something .. it is ONLY money. Oh, and have fun!
PS We did a taping of Meridith Veidra show in Rockefeller Center, tour Radio City music Hall, Empire State building (not to the top), met both Matt Lauder & Al Roker & whichever new gal was working the Today Show on the Plaza (auntie had her walker .. got put into the empty ADA corral where the hosts alternate glad handing guests .. we were the ONLY 2 people there ... got great pictures).
Your next Disney trip with the family ... it will seem very reasonable and very relaxing after NYC.