I got more in cables and sound treatments than $10k. I built a dedicated room within a room to get the correct ratio/dimensions and just this cost way north of $10k. Then you have to buy the appropriate equipment to fill the room. A 5 watt set amp with a pair of $5k speakers will not fill a large room at higher levels. I was using 350 watt or bigger monoblocks with larger speakers to fill the room.
if you think you can get 90% of the best of the best, get yourself to some audio shows or to the better audio dealers that have dedicated rooms to see what’s available.