I never saw an update.I am still tempted when I see low prices, high rents with returns of 18%+, but all these bad experiences are making me not pull the trigger.

The short answer is yes you will likely trigger a tax consequence for selling your property. 

I pulled the trigger on one of their Bennah Oaks properties in December.

We are 5 bids in and not sure we're ready to pull the trigger with anybody.

A buddy of mine took even longer as his plans triggered an Environmental Impact Study.   

On the psychological front, it sounds like you are feeling some anxiety which may be triggering "W2" thought patterns, which in turn may be triggering anxiety about falling into an "analyses paralyses".

We have vetted the company and decided to pull the trigger based on great reviews and conversations with other investors.

As for selling with 10% down at 8% interest, you now have two title transfers that violate the due on sale clause and add complications to subject to “safeguards” that reduce risk if note is accelerated, if party in possession doesn’t pay taxes or insurance, and of triggering whatever system the lender has set up to notify them when a deed transfer takes place. 

Over the last 2 years that I've managed a short-term rental in northern San Antonio, I have experienced many small contractors that get so easily triggered, offended, and upset at me and my wife. 

Plus if you are getting priced out of every other deal, moving too slow for on market houses, your realtor telling you that this is a bad time to invest, etc. then you may pull the trigger on a bad deal.