I agree...my math was off.
Thinking add 15,000 bleachers = 3,000,000
Add 4,450 lower = 3,115,000
Max court/Max Box.
The math seems to point towards building at a pace...perhaps a ratio of selling price at X%. I think the X% would be whatever your PR manager helps sell + your fan rating.
Also thinking the PR manager is more effective, the more tickets he has to try to sell. Which could make having a decent PR Manager helpful at high levels and higher seating capacity.
These are guesses.