What is our best course of action to put her in a position where she can sell the property?

There are some positive signs on the horizon.

The person, not company, you hire for SEO, or any internet marketing program, needs to understand your business operation, geographical area, target market, marketing position, competition md any other relevant information in order to design a program that will work.  

Also, if you're not necessarily looking for the cash in hand, we can always have the title attorney draw up a first position lien to your other LLC.

I’ll just start out by saying I’m not a fan of syndications and own a number of single family rentals just to mark my position from the outset;  but the answers as to “why” may provide enlightenment to you, so I will throw a few out for your consideration.., some of which you mention, so it seems you must be aware of them.As an investor, your goal is typically  to maximize your return and minimize your risk.  

While I can't speak to Oklahoma City or Pittsburgh specifically, I’d suggest taking your time to explore potential opportunities in the three others.Also, @Andrew Roth may be a great resource, as he was in your position a years ago and is now looking for a second for his portfolio. good luck! 

My Question: How do I quickly position "what I do" to focus on "I'm looking for houses in this area."

There are a lot of costs to sell and I would argue you’re in a good position to hold for the long haul.

, Would the seller consider keeping a partial equity position and retain prop management duties?

In retrospect, some yellow flags found by the property manager during the tenant screening are now bright red flashing sirens, but the tenant showed decent credit, had a positive previous landlord reference, wrote a charming cover letter in his application, and applied through the referral of a reputable real estate agent.