I can hire someone to fight bedbugs and gun toting tenants, but city councils that are tenant friendly scare me about what they are going to think up next. 

To do #3 prepare to spend about $25,000 on legal fees and 2 years fighting over the property with no guarantee of winning.

3) is it even worth fighting for $1500 via court system?

If they fight leaving, you don't really have a recourse, so other options work better.However, if evictions are permitted, then just assume you will have to evict, give them money to move and 15 to 30 days to do so, hold back a significant amount of money to be presented to them the day they are out.Also, if they are a protected class ( elderly, minority, etc) and are facing foreclosure, be aware of the S.A.F.E. act in your state and any foreclosure laws.

I believe that would be well worth the investment, because he is going to be the one fighting for it in the court should something happen.

Or go to the city and fight to get it rezoned, even into a 4 unit and spend money combining units fro 7 to 4, any tweak to existing building would be cheaper than tear down….

@Ernesto Barragan JR you just asked the question that every insurance agent and financial manager are going to fight over...  

And even in prison there are no rapes or abuse by guards or fights like is common in US prisons.

My end goal is to keep the 40K usually entitled to the agent and yes he brought the buyer however and in text tried to force me to sign a due diligence extension, like his action for lack of a better word, clearly show is dishonesty as well as this issue with the notice I don't know the laws in PA but it's likely the agent would fight you.

Since an eviction begins months before they are forced to leave, it's up to them to decide to fight it or face the inevitable.