Google for "Service Agents" and choose one to do the work if you do not want a fight with your new Tenants.

Fortunately, all three inspectors (from different departments) were very supportive and one inspector even stated they will not return, even if another complaint is filed.I want to offer a cash-for-keys option, but since the tenant's attorney is from a nonprofit, I feel she will fight for her tenant to stay.

You could go try to fight with the seller, but why?  

They dislike the new tenants in front and have complained about smoking (not allowed) and loud fights.

I know of a person who was convicted of manslaughter (he got into a bar fight when he was young and the person fell and hit their head on a counter and died). 

Well while you are fighting the fed I am going to keep connecting.

. - The time is always NOW, so many people stayed out of the "fight" over the last few years and now with rate hikes they are kicking themselves because they missed out.

Also I went through 5 property management companies, all of them skimmed a little extra, got in fights with the tenants, etc.  

If they choose to stay and fight, hold your ground.

I personally develop quite a bit in a neighborhood where the zonign laws are already quite prohibitive and to make matters worse, the community as a whole fights all housing from being built in the spirit of stopping gentrification.