All of the comparable properties should be the same style, size and in a comparable physical location without crossing natural boundaries like streams or large roads that may put that particular comp in a different neighborhood. 

Do you recommend meeting a POC of theirs physically before engaging in business?

I currently oversee a communication center which uses an ERSI based mapping platform and that is tied into a UI that allows my operators to track physical assets anywhere in the world via Iridium Sat Tracking and we are currently working to add ADS-B tracking coverage to the platform as a redundancy.

@Casity Kao interesting thought -- I never would have thought to physically visit the tenant in their current residence.

You can’t make the seller pay off loans if they don’t physically have the money. 

From someone who took the non-traditional path to being an investor and Realtor (I was a Physical Therapist for 20 years), my questions to you are:1.

Account Closed With the exception of having a physical ailment that prevents your ability to print carefully, if you can't figure out how to slow down and write in clear language - you're going to run into substantially larger challenges : ) This really should not be an issue worth expending you energy on.You can just Google yellow letters and call script, there is hundreds upon hundreds of examples.

The seller won't physically make any repairs, but after an inspection is done, they may negotiate credits for repairs to be made after closing. 

To find a seller who would be ok with this is almost impossible, since they would not have the physical asset as collateral.

This is not financial advice but I'm short stocks and long commodities, income producing real estate, physical commodities and rare natural colored diamonds :) On the leverage side rates have mellowed and I have several transactions pending and closed with incredibly reasonable and even favorable mortgages secured. - Six plex with a local credit union with with 30% down in the 6%'s fixed. - Turnkey triplex with 10% down, 3% financed closing costs and no PMI in the 7%'s - 9 Plex with 15% down no PMI in the 6%'s on an investor friendly ARM.