Then I ran separate CSST lines with individual shutoffs @ the manifold for leak test & isolation to the dryer, gas stove, boiler & HW tank.

In short, this isn't simply an isolated BH issue.

Just the isolated location in itself says a lot about it’s desirability.

Since most attics are isolated, there is a good change the isolation will also contains mold.

You don't know where - further isolation testing and a camera are required to determine the specific location of the leak. 

Look into isolation clips for resilient channel.

Small price to pay for the isolation and privacy in our 5 acres of forest that's surrounded by another 30 acres of conservation forest!

CHICAGO... where you are from.Let's say you thought Appreciation was only the Gravy and that you will only qualify a property based on Cash Flow and NOT future appreciation.Imagine this was 10 years ago.You would be at the point where almost ALL of my friends and family in NYC are at this very moment.... completely priced out of ANY real estate in Brooklyn (and in your case decent neighborhoods in Chicago).In reality there are 4 different ways to Analyze Real Estate:1) Cash Flow2) Mortgage Balance Reduction (think about a 30 year mortgage disappearing at the end of the 30 years)3) Tax Savings and4) AppreciationIf you Master analyzing Real Estate for all of these components and treat them not as GRAVY but as actual components, then you would begin to build and expertise on how to do Analysis on NOT JUST CASH FLOW.You will develop your expertise on calculating Appreciation as well.If you ZERO out 4) Appreciation, BTW, you still have the other 3 components.If you ZERO out 4) Apprecation AND 1) CASH FLOW you still have 2) Mortgage Balance Reduction and 3) Tax Savings.Let's say you ZERO out 1) Cash Flow (because your Tenants will pay all of your expenses including your Mortgage payment but you get no cash flow), 3) tax Savings and 4) Apprecation.That leaves you with only 2) Mortgage Balance Reduction.Why did I isolate this?

A pay period has since passed and I am still working with the seller to isolate rent payments, transfer the security deposits and obtain all the licenses and documents for the property. 

If the house is isolated and in the middle of nowhere, I would avoid it.