Don't know about NH but Massachusetts makes it ridiculously difficult to evict anyone. There's no shortage of low life freeloaders out there who game the system. By the time a landlord gets relief from a court ordered eviction they are out many thousands of dollars and most likely their property is trashed. Essentially these type of people are squatters and the laws regarding that are equally insane. When I lived in Florida, an eviction was a matter of a call to the local PD and the evictees were gone in 24 hrs. A little harsh but effective. If a landlord struggles for a year with a legitimate eviction, the next tenants will be paying a whole lot more up front and monthly after that.