Impatient Aussie considering attending a January concert

[secret love]

With every day I get even more impatient to see and hear Fleetwood Mac live, all five, for the very first time. I'm not sure I can wait until November when they are due out in Sydney!

Considering going to the New York Madison Square Garden concert on 22/1/2015 or 1/22/2015 as you Yanks would write.

Where is somewhere affordable but still decent to stay in New York? Just thinking about going off on a whim. Not sure if I will do it or not but the fantasy is just part of the fun.

I have some cash to play with ...don't want to stay more than 2 weeks, would do some sight seeing and wouldn't spend much time at the hotel so it doesn't have to be amazing. $200 US or less per night would be good, ideal would be $100 US per night but I'm probably dreaming there!

Backpacker style accommodation/lodges are fine also.

What do the New Yorkers here recommend? I'd like to keep within a budget of say $2500 - $3500 for 1.5 - 2 weeks not inclusive of return airfares, just accommodation and spending money.

Suggestions on what to do, where to go, who to see?

Thank you!