My partner is building a $2 million house. The first bid that he received for A/V/Security was $250,000. The proposed Theatre system couldn't have made music to save its life. Fortunately sanity prevailed and now we're talking $50,000 or so, including a 2-channel set up and a much more modest video set up.
The wife had no idea how musical a system could be. She attends concerts regularly, yet she'd never heard good sounds over two-channel. Once she did, she wanted more and gave up on decree that all speakers had to be in-wall. So, they'll have a modest, but musical, 2-channel in attention to the full-house distribution and reasonable video.
When building a $2 million house (surely an ego statement) many people don't balk at $200-500 thousand for media and security. It's foolish, IMHO, but it's more common than not.
BTW, I drive a Hyundai Azera and my partner drives a large Mercedes and a Lexus 400-series SUV. My wife drives a Hyundai Sante Fe SUV and his wife drives an Audi A8L. He's got a hanger with airplane, I've got a room full of great musical instruments. We're great friends and partners, but with very different personal priorities.
EGO is everything. It took me a long time to understand that in the business world. It doesn't matter if you're talking about $100 or $1 billion, ego is MORE likely to impact a decision than logic.
Dave