I want to say we were just short of the super bowl hotel requirements a few years ago and a decent amount of hotels have been built since. Niagara falls has a lot. If they allow Canada there's even more. We should have enough.
NCAA final 4 requires 60k seat stadium and 10k hotel rooms. If Niagara Falls Canada is included theres 16k right there. I can't find recent numbers for US but as of 2014 the city of buffalo had 2400 rooms. The immediate suburbs have a decent amount and NF NY has a lot. Then it's up to an hour drive. So Batavia, ellicottville, Lockport, Dunkirk.