Make it your business practice to post the notice to pay or quit precisely on the day after the grace period ends, every time.

Send a Lease Violation Notice immediately - by mail with proof of delivery required (cheap date through post office) and or affix the notice in a envelope with his name on it on the door of the unit. 

Don maybe referring to state of Texas were lease options are highly regulated.. just sayin..

The Chicago Association of Realtors'® specifically state "When you become a Dual Agent, you owe equal fiduciary duties at that point to both parties in the transaction, and you lose the ability to negotiate for, strategize and advise either one."

I didn’t see what state you moved to?

Our contract states that we charge the entire contract, including unpaid fees. 

If you reread my post, you'll see that I was clear that my purpose was to avoid that what you wrote would unintentionally mislead.

Hello Doug, I am not a real estate attorney nor is this legal advice.Unless someone's state has specific laws banning contract assignments you should be fine doing the following.  

They have failed to renew my entities with the Secretaries of State multiple times, have billed me wrong amounts, and GREATEST OF ALL, have cost my business ~$50K in cumulative TAX PENALTIES due to negligence in filing for a tax extension, failing to walk me through my tax filings and needed payments, and failing to file an abatement promptly.

.: I set up LLC's on the secretary of state website for $50 and it takes about 10 minutes.