First off set prices to
$11
$49
$200
$1600
Then set your self short term goals to build arena. Maybe try to get your arena to 5,500 Bleachers, 750 Lower Tiers, 30 Courtside, and 5 Luxury Boxes by a month. And keep setting short goals to increase size, also dont forget if you get more seats you will have to lower the prices of the seats.