Hi Meadow, it sounds like you're really excited about this, and I don't want to rain on your parade, but...
I used to work at an accounting firm in Manhattan and it was not fun. :-(
Long hours, and with an MBA, you might try for something better than a Big4 (if that's where you're going). Yes, the financial upside is great if you make partner, but you'll be working like a dog for not that much money for a very long time before that happens.
Also, you will be working with a bunch of 22 year olds at an accounting firm. Every year they get a lot of fresh graduates and everybody moves up together, while others from their starting class leave. In fact, you will probably have to report to people who are 25-27...
From a financial freedom standpoint, having lived in Manhattan for several years, making slightly more than the figure you quoted, and still not being able to save given the taxes and extremely high cost of living (not that i was very Mustachian then), I would encourage you to reconsider... I felt pretty trapped where I was, and don't want the same for you...