Replacement cost would likely be in the range of $20K-$25K, depending on how you price replacement for items no longer made. Speakers comprise about half of that. My electronics have lots of DIY upgrades, but would still be near $5K to replace. Most of my wires are either DIY, or basic decent lesser name stuff. I try not to pay for marketing.
What is the current retail cost of your reference system?
It would be interesting to share this as I am not sure some of us understand how decisions are made within the framework of cost and resolution. Please avoid used prices as that muddys the water significantly. Also cabling costs would be revealing as well if willing to share.