Heck go to the casino and put it on roulette wheel of black or red. 

Even I usually flag these for spam.

This allows me to make a full decision knowing the nature of the repairs, cost of repairs and have the ability to back out of my offer if there is a red flag or major foundation problem that increases my repair costs dramatically higher than I anticipated.

I saw some red flags and some complaints about how they handled some construction with asbestos in the house.

I am also following your opinion and analysis as well.You were said before that you met this hedge fund guy (or whatever) that their AUM is hundred times more than your AUM correct, but while you able to manage your portfolio and management, their portfolio is all at red. 

Also, bitcoin in this instance is a pretty glaring red flag.

So be careful and make sure you interview the Expediter and that they have had success in obtaining the Letter of No Objection.As far as evidence that you need to gather, look up your buildings TAX Class.You will find it here: Building Information SearchHere you will see something that looks like this:NOTE that while this is a Dept of Buildings Web Portal, what I have circled in RED is the Department of FINANCE Building Classification.You may not have a CofO, but the Dept of Finance maybe taxing you as a 2 Family.

Just don't change your address to your parent's house, that would throw up a red flag. as long as that remains your primary and you aren't renting it out for at least a year after purchase, there shouldn't be any issues. 

My questions for you all:Is there red flags that you look when searching for a house hack deal?

I know Red Awning charges 10% and they handle most of the guest communications and listing, pricing for you, but you still need to arrange cleaners.