After examining the analysis I had done on his offer and then taking a look at my counters from the view point of a buyer he realized that what he was asking for it was a waste of time and if he were to put it on the market and try to sell it to a stranger nobody would want it with his numbers through seller finance. 

I know this is very brief, but if you want to learn more, you can view my youtube channel real estate asset protection for several videos on this subject.

I've discovered that explaining our requirements to potential tenants even before they view the property has been extremely beneficial.

Anyone advocating for this strategy you're suggesting makes substantial commissions which I view as a conflict of interest.

We sold a large 3/2 X 2 duplex in Warrenton for $550K+/- and helped several clients acquire duplexes with views in Astoria around the same mark.

It's about the submarkets there, dozens of them, not just the MSA-level view. 

Now the court will view this as the tenant is trying to make good on their rent.

I'm also a realtor in Nashville and am the GP of Klout Capital.Again, stay skeptical y'all.Herzliche Grüße-Andreas* The preceding has been my opinion only, the views are my own, and are intended for educational and entertainment purposes only and does not constitute financial advice.

Perhaps your investor should post here himself to get a less biased view.

Beyond the listing, use Google Maps and Street View to assess the property layout and surrounding area.