There was an obvious violation of quiet enjoyment, and after the police were involved and the individual arrested for harassment, I'd think the PM had grounds to move forward with getting them out. 

This bulletin outlines the good cause grounds for an eviction of a tenant from residential rental properties in New Jersey, pursuant to the Anti-Eviction Act, as set forth in N.J.S.A. 2A:18-61.1.Here are the requirements the state has for "evictions". 

I waded around in week old take out, poked around the ground with a stick and found the clean out.

The house next door that sold for 225 or 325 won't carry the same intrinsic aspects of value.Often, it's boots on the ground that you need and ones you can trust. 

Furthermore, there is SO MUCH stuff on the ground (furniture, clothing, boxes, etc) that I cannot physically make it to a wall to measure.

I am grateful for your reply and for your expertise.I have owned the property since 2002.

I figured it would be related to cold weather/snow on the ground in some areas, as well as school schedules and holidays. 

Assuming they made rent payments within th elast 7 months you can show they falsified the lease and you may have grounds to evict.

3) sending alarms about behavior and/or his choice of friends.I would give notice that any breach of lease terms will be grounds for eviction, no third chance.

This makes for changes in the underlying ground over time affecting the foundation.