Acoustic treatment question: do you agree with Dennis Foley that $46k to $65k is required?

My last home had a concrete acoustic ceiling. No asbestos laden soft material. It was heavy and would require a rebuild of the entire ceiling to remove it. But why do that? 

That kind of ceiling makes for a great sounding room. It was 19 x 29. It was a den/living room that was my dedicated listening room. The issue: Stone and wood and one side wall and nothing but drywall on the other side wall. But it was a fixable problem.

Sometimes what you are dealt with, by sheer luck, is a great sounding room.  The bass response I got from a pair of salk Songtowers was simply evil...and not boomy at all...just deep and clear as sin. Then I moved.

I think we gotta work with what we got. Each room has it's sonic signature..and is unique. 
Some just require a lot more work. 

Sound waves really don't care if you're a certified room treatment product.
So you can be sneaky with room treatments:

No on glass-framed artworkYes on framed canvas paintings
Yes on wood carvings and tapestries
Yes on balancing the left and right side...
Yes on drapes and house plants in textured potsNo on glass coffee tablesYes on strategically placed rugsYes on fewest things between the speakers
See where I'm going where this?