I have seen where some investors have included in the contract of Sale to sweep for an underground oil tank as a contingency. 

I need a buried fuel oil tank pumped out so it can be removed ASAP.  

If you pick a lemon (whether its the property or the investor you loaned to) and get it back in foreclosure, your returns can evaporate quickly.

I say this from experience, that the oils from the body will eventually seep into the grout and I haven't found a good way of getting it all out; scrubbing lifts the top stain but it eventually just comes back through. 

Looking at a lead and wondering if an above ground oil tank is something that is an issue?

The blame will be placed on China and imports or on Russia and oil, but life will go on much as it has since World War Two.

Lemons; and, of course, 10.

Rethinking Transportation 2020-2030: The Disruption of Transportation and the Collapse of the Internal-Combustion Vehicle and Oil Industries (RethinkX Sector Disruption) (Volume 1) 1st Edition

I tend to take the longer view and I think a lot of the metro areas are a bit overbuilt, and overbought, by out of town speculators, from the look of all the "for rent" signs I see in some areas.In the last 4 years I sold 3 Houston houses that had been built in the (high oil price) boom of the early '80s.

Make sure you get actual bills for expenses, if the seller says they don't have them, tell them they can contact their heating source supplier (gas or oil, I'm assuming) and utility providers for billing history.