Is it a pig in lipstick?

[Jake Drappi]

I am currently looking at a turn key property for my first deal.  It was a recently flipped house, and it is calming for my wife that our first property (which is going to be a house hack) would potentially be fully renovated.  However, the house is heated by an above ground oil tank.  Are above ground oil tanks, or oil tanks in general, a deal breaker for anyone?  Also, what techniques would you use to see if the flip was actually done properly and professionally and that corners were not cut that can be costly in the future?  I would like to hear any stories in which these were factored in and how it played out, along with some suggestions on what to keep an eye out for concerning corners being cut.

Thanks!