But I figured it had to have at least an oil tank in the basement at some point.

Luckily I will be doing this on a full time basis and the many years of project management experience in Oil and gas Services contracting should be of some help.

Frank,I am a mechanical engineer myself and moved to Houston to work in oil and gas!

., any towns near the oil fields of western North Dakota can be risky...the region is heavily tied to the strength of the oil market which can be great when everything is going well, but can get ugly quickly when the oil market turns)? 

I'd like to get some a second opinion but I don't know where to start.We converted from oil to gas when we bought it in early 2015.

I thought for sure Calgary will crash with 2 oil prices crashes since 2008 – the market is now described as “soft”.

One of my concerns was the heating oil currently in the tank.

It is useless.The 70% rule, or ANY generalization rule will not tell you how much rehab it needs, what location it is in, how long that buried oil tank has been leaking... undersgroundNOI said NO!

Heres the challenge: Presently 2 oil tanks there.

I will share it with , but please don’t tell anybody ...Anyway, he says in Iraq  prices are really low now, and cash flow is high... economy is improving plus they have oil= he says it will be next Saudi Arabia...He is selling few of his Phoenix properties and wants to invest a million dollars over there... he is open  for partnerships ...If u are interested, let me know I will tell him :)