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. 

If anyone here has 68 k to spend on room treatment I will take the job. I will get it done over the top for 10k and pocket a 58k profit for my work great gig if you can get it!

No...not really.  Thoughtful room placement of speakers and furnishings, using Mapleshade’s speaker placement advice should suffice for most listeners.

Don't be silly!  Find a nice rug you like and hang it on the wall from a one inch spacer. Maybe a couple of rugs on different walls (on the floor if it's not already carpeted.

Just a carpet? Um... https://musicstudiodiy.com/use-carpet-acoustic-treatment/