One good thing about being submersed in a culture like NYC where your kids see other kids having "too much"... they will learn to appreciate what they have, and they will learn what they actally need!!
I am a PT nanny for a 1 1/2 year old, and when we go out for lunch (rare) we share everything and drink ice water with lemon. She doen'st know the difference, yet, but she is learning how great sharing is, and how the extra money can be spent or saved.
That is what dh and I are actually excited about with our (upcoming, 11/7/05!) daughter. We live in a really nice neighborhood in Long Beach CA, in a tiny tiny little apartment, but we love the beautiful surroundings! We'd rather live simply and enjoy the ocean, parks, and neighbors. We have learned and adapted to sharning meals, bringing snacks, and not wasting. We are so excited to teach our baby!! We kind of think of it as a respectful way to live... not in excess.
It might get tough for you, and frusturating, but when you do enjoy the moments, let your kids know you are enjoying it! (I even told the little girl one day, when another little kid was eating a hot dog and soda: See, we are eating yummy healthy food that will make us so strong, that poor kid has to eat a hot dog
we shared a veggie and cheese sandwich)
Have fun in NYC, i love visiting that town!!