Once a renter gets it into their head that they don’t want to leave a rental, they can drag it our for 6 months easily, rent free, before the NY authorities will throw them out.
Oh yeah I’m well aware. I have a horror story about a subsidized tenant who was bribed by the local S8 office to stay in a unit I purchased. This tenant routinely broke her lease and moved every six months. I worked for S8 at the time as a clerk. They thought it was a conflict of interest on my part (it wasn’t) so they incentivized her to stay there as long as possible WITHOUT paying rent.
I gave her the standard 30 day notice after buying the property and they caught me in court for a whole year even after I had left that job in disgust and the problem tenant had moved out.