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

I wouldn't waste five minutes on Foley's follies.  Period.  Just move on from him.

Just establish your budget, use REW and a good USB mic, begin with very low and low frequency mitigation, then first reflection treatments, starting with side walls and rear wall.  Determine which products you can afford to purchase or that you can DIY, based on proven design effectiveness.  Finally, determine what compromises you will have to make in terms of budget - what you can live with or be satisfied with.  

@ shalommorgan, thanks. If you have tamed those wobbly waves down to 30Hz then your room should sound as good as it looks.

I will send you a PM shortly.

I tamed wobbly waves down to 30hz with good speakers and Dirac.

I think you might have to tear all your drywall out if you use this guy he hates drywall. He might be right, I have no experience with wood on walls instead of drywall.

I just installed some 5 ACDA 10 and 8 ACDA 12 modules in my small room, about 2000 cubic ft. They were all custom made. Had to wait 9 months with all the shutdowns in California, but they did arrive.

The low end, below 100hz, is dramatically controlled now with minimal room boom. I do not have room readings, all I have is my ears. I have been a sound guy for large churches for 20 years. I had a ENT tell me I have "bat ears." I hear higher and lower than most humans. The mids and highs are clear and dynamic now in my room. Room is not dead or over absorbed.

I have GIK Acoustic 244 of different sizes to control the 100hz+ frequencies. Total acoustic treatment cost $7,500, and in my mind worth every penny.

Room is 50/50 HT 7.2.4 Dolby Atmos and stereo music. On a side note my wife of 22 years calls the room "The Mistress."