(not counting lower maintenance costs like no more oil changes etc…).

Only thing I see missing is utilities, common for these properties to only have 1 boiler, especially if on oil.

Talking 30-100 SFR property range pool with that being a portion of their investment portfolio(so not including ag, oil, timber investments, etc.). 

If I recall he offers his Air BnB services and had several properties around Lucas Oil Stadium.

Industries are more diversified than in the past when the local economy went however the oil and gas industry went.

.), painting the walls and ceiling with an oil-based primer to ceiling in the remaining tar, painting, and installing new flooring. 

An in ground oil tank for instance can be a considerable liability. 

I have, however, been attempting to DIY paint the kitchen cabinets and have spent over 8 hours just trying to clean the cabinets of all the dirt, grime, and oil built up over the years.

Oil is $80 right now and some people predict $200. 

@Konstantin BoubevI used a company called ERC for an oil tank removal twice.