Personally I think it should be a legal requirement for the reasons detailed above, showing comprehension for the legal contract there entering by proving consideration and thought has been made for potential exit and dissolution of said contract. 

(any feedback on that estimate is appreciated BTW).

I don't know all the details, others on this forum can answer that better.Why not buy a primary residence and live there for a while? 

E-mail with details has been sent your way.Also, thank you @Jonathan Greene for helping to point this to the right person for assistance.

The engineer can help with this estimate, but local contractors are the top source for getting this info. 

Are their listings detailed with good-quality photos?

Pittsburgh's current population is 302,000 (US census estimates 2024) whereas in 1950 it was 676,000. 

If that's the case and you aren't viewing more properties in person than you are making spreadsheets on, you are destined for analysis paralysis.Spreadsheets can only tell you estimations based on numbers given to you online or by a real estate agent whose job is to sell the property.

Here are some details on the note i'm looking to sell. - $45k balance (40% of BPO value)- 7% rate- interest only- maturity date 2/1/2026- mortgagor (owner) pays 3rd party servicing fees what is the value of the property?

I'm pretty confused as I thought FOR SURE this was a duplex given your estimate of $2,850 monthly cash flow.A duplex wouldn't even achieve that in this area.