Resists chemicals, urine, blood, MEK, acetone, oil, vomit, the whole 9 yards.  

Are the boilers the sole source of DHW or are there separate gas/oil fired hot water heaters?

I agree with @George P. about the Roxul and de-coupling channels (I use both in my new construction duplexes), but neither are likely a good option for you.I believe that any insulation you can blow into the wall cavities will not likley provide must sound damping (Roxul is heavy insulation make of mineral wool made from stone).  

If oil gets to $20 per barrel, I may move the 401k into Chevron or another oil stock for a year or so.Unless there is another wave of pending foreclosures, then housing prices should be fairly stable.

Leaking underground oil tanks, zoning issues, third-party easements, lead paint or asbestos, foundation problems, title issues, flood zone reclassification, etc etcSome of these could prevent financing but are solvable long term, so perhaps if you can pay cash you'd be OK.  

I see a lot more headwinds (Chinese economy, oil prices in oil states, credit market turmoil) than tailwinds (household creation/job growth, consumer spending).  

There are barrels of oil from his vehicles.

One risk I see is in my area oil prices being low is a bad thing.  

When the collateral is crops growing or to be grown, timber to be cut or minerals or the like (including oil and gas) or accounts subject to subdivision (5) of Section 9103, in the office where a mortgage on the real estate would be recorded.

Oil tank problems