I feel I can certainly continue to study the Philly neighborhoods to extract where value might be.

And what happens when the owner wants to extract capital from the C Corp as salary and/or dividends?

When looking at sale comps, be careful when using extracted cap rates.

Not for the purpose of extracting every last dime from tenants. 

Please understand though that major repairs, as well as capital improvements are required for these type properties unless your end game is to extract as much current income out of the property while doing almost no maintenance, better know as being a slumlord.

The difference of P&I on a $80k loan vs $90k loan is roughly $100, so if you are confident that extracting $10k and applying it towards an investment will produce higher returns than having a "safety net" of $100/mo, I would refi at the higher price.

If not therr has to be a portfolio loan option in there somewhere. 14 homes (depending)  sounds like a super solid asset base ripe for extraction 

I can reach out directly to the listing agent for details but I feel like an agent would be able to extract better intel. 

Once the cash flow becomes outstanding, it is usually time to refinance and extract value which then lowers the cash flow and the process repeats but I have much bigger pockets due to the money extracted.  

If you did this then you can extract the equity from the properties and reinvest it.