Joel,
From rereading this thread it appears that (please correct me if I have misread or misunderstood):
1. You have hired Tony Grimani to design the room and spec equipment.
2. You are happy with the design and the the equipment spec, including price of equipment.
3. You got a quote on the construction of the room and it was WAY more than Grimani or your integrator thought it was going to be. You did say the construction cost were 80% of the overage
Now, considering that the price of the Triad packages listed range from $50,000 to more than $100,000, and you are doing a custom design and not a package,I assume that your equipment price is in the 6 figures.
Therefore, the construction price must be way up there too.
Since you already have a room that you want to remodel, you will not be building a foundation, roof, load bearing walls, etc. I am having trouble understanding how remodeling a room, even if you go with a complete room in room construction, could cost so much. I can see that if you have a really large room, and want really fancy wood work and finishes the price can get up there. Add a wet bar, etc, etc etc and even more expense.
What in the design of the room is costing so much, and can that design be simplified so that you have a sound proof and treated room at less expense?