We need to evict a holdover tenant in New York State, they have stayed in our rental for 3 and half year,

question, 1. what kind of notice we need to send, 30 days or 90 days? 2. lease is expired by end of June, and they paid rent for July and August, if we try to evict them after that, should we accept rent in the future? 3. They told us there is leaky in house (the corner of garage) in the middle of August, is that our responsibility to repair? 4 the leaky is not too bad, we assume as long as they don't use the small bath room ( it has 2and half bath in house). The house has a lots of stuff and people. I am not sure if we can fully assess and fix the leaky w/o vacant. If we couldn't do it, will tenant use that to against us and suit us, or make judge to dismiss the eviction case.