In addition to that the money that I am saving from previously paying rent, electric, internet etc...

I can send you additional info if you want.

That way, you can live rent free and save what you would have been spending on rent to buy additional properties. 

Is local market research just an exercise in futility?

Any tips, as to what I should be asking other than, any other offers, any additional liens on the property, etc.

Just curious if anyone uses Truthfinder to do additional “screening” or background verification for tenants?

Unknown how many additional were rented, leased, subleased in the year.

I don't have as much of a feel for lot sizes, but it seems like understanding what size lot typically corresponds to what number of bedrooms would let you know pretty quickly if there was room for an addition. 

In addition, they'll advertise the same ad on Facebook and Instagram.

In addition to what Wayne said the seller will have to pay imputed interest gain and will make almost or maybe ZERO cash flow if he takes this to an accountant .. or anyone who knows anything about these seller carry backs your going to have push back I suspect unless your paying WAY over market.I have sold a lot of my OREO over the years with ZERO % owner carry but always set them up short term.. 30 months 40 months that sort of thing ..