In 2018, the body that runs the Olympic Park estimated the total amount spent on the venue at $1.7-billion, or $5.2-billion in inflation-adjusted 2017 dollars.
I mean, it's not much better at the Bell Center honestly. Sound quality is not really a reason why it's nice to go to shows there, it's the crowd and production. As soon as you're not in the speaker array zone (which is mostly right in front of the stage in the GA area), sound quality and fidelity drops drastically. So I think with maybe more of those arranged properly it could be close enough while still providing 4 times the ticket sales.