I keep hearing about BiggerPockets from successful investors I respect. 

Of course, if the numbers don't add up there's never any respect lost from walking away from a deal that doesn't make sense and moving on to the next. 

Your advice has been very valuable to me, so it pains me to respectfully disagree.

Well kept homes don't see this type of damage though on average.I would respectfully disagree about Dallas market being slow. 

Jacopo, Jonathan, Bradley, Shawn, Michael, Jorge, Adrian, Bruce & Tanner- Thank you so much for your respective input.

I mean, I respect how people do business of course...but how do we know if they are any good? 

No idea how to deal with the 2021 originated underlying mortgage loan with the owner's share of the current principal due of $200,000.Joe -You're raising a valid point regarding the distinction between the two mortgages and their respective origination dates.

Any advice or criticism is respected and taken into account.

CBRE, Cushman, Marcus and Millichap, Capstone Group, are all pretty active multifamily brokers in my market, and they will not list their properties anywhere but their respective websites.  

If you're using regression to predict how much a market would appreciate by I think that would be a much easier regression task then predicting how inflation would increase the price of a gut rehab (increased parts and labor prices due to increased cost of manufacturing and increased cost of living respectively).