Regarding a listing agent showing a property to an unrepped buyer and potentially triggering what is called "implied agency": this is when an agent performs agency duties for a principle (buyer in this case) who they don't have a written agency agreement with, and establishes an agency relationship through their actions: https://www.prepagent.com/article/creating-agency-relationsh...Hope that helps!   

If i buy the property as myself and then transfer the title to the LLC, it could trigger the pay in full clause.

How should the deal be structured to not trigger tax payment for the $0.5m that she is leaving on the deal?  

To protect yourself, you need a specialist.Just like you wouldn’t go to a cardiologist for a brain injury, you shouldn’t rely on a real estate lawyer for loan docs – unless this is their specialty.

Will it trigger another 30 days from date I resend?

Even if I wasn't ready to pull the trigger on an investment today, I would probably stash that money someplace simple and safe like a CD at 5%.

with an objective of having your network in place when it's time to pull the trigger on a deal.  

I’ve seen landlords successfully sued for large amounts due to refusing to remove dead trees resulting in injury; not complying with swimming pool enclosure laws; having window frames in such bad condition that window ac units fell out; refusing to disclose existence of toxic mold; not eradicating lead paint; and many more.  

We pulled the trigger on moving to Texas.

It can get pretty complex versus long term rentals - I'd highly suggest using tools like AirDNA that has pretty sophisticated data and projections on STRS in every market before pulling the trigger