Madison Square Garden Always has a very active scalping scene out front. A few tips from a frequent MSG attendee, print out a seating chart for Wrestling, know what section the Iowa fans are designated for, if that's important, and never accept the first offer. Walk away , and they will follow and lower the price. They are the guys walking around saying 'anyone selling'. Counterfeits are occasional, so that's a small risk.
Also, Madison Sq Garden sits atop Penn St Railroad/and Amtrak, with 2 subway lines as well, so it's easy to get to train/subway from almost anywhere.
Wrestling seating chart MSG-
https://seatgeek.com/venues/madison-square-garden/seating-chart/wrestling-177997/
Tickets have been on sale since last March, here is the official site :
http://www.ncaa.com/news/wrestling/...ednesday-2016-ncaa-di-wrestling-championships
For those that like Greek Food, eg Gyros & Soulaki (and I'm guessing not to many in Iowa are, lol), one of the best in NYC is right across the street on 7th Ave, and it's very low priced, informal. For Steak lovers, Keene's Chophouse is a short walk from the Garden. Keenes is NOT cheap.
http://www.keens.com/
Madison Sq Garden was refurbished a few years ago, has great viewing sight lines, and also has an awesome selection of beers, liquor, and food. Not cheap however, figure $10 for premium draft beers, 16 oz., and $15 for decent liquor, usually double pour.
Hotels in Manhatten , NOT Cheap either, check VRBO to maybe rent an apartment or priceline to find a decent price (under $200 night).
I'll check back to answer other questions for NYC newbies'