My engineer did briefly mention to me this was a risk but felt comfortable defending our position based on our compliance with AASHTO and we never discussed again.

If unsure how, lookup local chapters of MFH landlord associations, they are champions of this and may find data from them.

Within 4 months...There would be no way in HELL they would have gotten this far so fast on their own or through YouTube.I am not defending mentorships just because I offer one.

The time of the clean cut, good guy champion has arrived 

You might win, but it may cost you money to win and hire a lawyer to defend lawsuits. 

Others are in the camp of staying the course.Ultimately, this is going to result in lawsuits (likely class action) and cost the county far more to defend.

Also Golden triangle guys investor group on Meetup, they meet at sertinos in the best buy parking lot. seems like a lot of people get their real estate license from champion

The burden of proof would actually be on the claimant in this case however, not the defendant (your comment makes it sounds as if the defendant would have the burden of proof which is technically incorrect).

I know enough to know that there are so many unknown variables out there when it comes to investing in stocks that I've decided to just side with the very convincing and the strongly defended academic theories of guys like John Bogle, founder of Vanguard.Real estate is still an area I'm trying to learn as much about as possible before making any long term commitments that impact my finances and lifestyle.  

Though a cost seg study doesn't increase your chance of audit, if you happen to go to audit it would be very tough to defend as a lay person.