My opinion is that the Buyer will probably win at the hearing. 

After winning the case of eviction from court, now schedule sheriff for in home eviction.

You can win on principle and tell them they are violating the lease, start the eviction process, and lose (what I presume is) a good tenant, or you can make this an opportunity to increase cash flow and keep a good tenant happy.

Offer them 6% - would be win-win! 

I'd rather aim for a win-win.

So check your townships rent control guidelines because if he goes to court and wins your still going to be stuck with him and it will be for nothing.

Unfortunately, with my current line of work and needing to win over my wife on that one (that'll take a while...she's a Bay Area native :) ), that may not be an immediate option.

The best way to win in CRE is to leverage the six degrees of Kevin Bacon.Consider partnering with a track record sponsor in the process to hyper accelerate your objectives as well.

That's an area where you could use $1000 per month to put ads in their local papers or websites, or sponsor some local events where you have a booth and a huge banner and give out flyers.I'm talking small town guerilla marketing - get out there in the areas you want to win and find way to touch THOUSANDS of people in those target areas repeatedly.

Position yourself in the negotiation as investor creating a win-win, not as someone desperate to take any loan offered.