As my pooster said before, money invested in the arena would be a smart and more succesful move midterm and longterm. Also you should put more attention into it already, your bleacher prices are way to low for your capacities, also you lower tie and court side seats are always sold out with your entrys fee which is an sign that you most likely get more money if you ask for higherprices. So i would raise the entry fee drastically*, in those categorys and also build extra seats.
The price for the luxury box, are ok when you promote if not you could reduce then a bit.
Also a thing i would change are your staff, the level 4 trtainer is imho the cost effective trainer so you did a good job getting him. But for the other i would uprage a bit to get one with a speciality(massage and since you won't be a championshipteam, the extra homecourt bonus from the pr). Maybe even level 3 could make sense, but especially on the PR such discussion are more religious then based on facts.
* orientate at teams witha comparabel situation, maybe you could check out the team who is promoted before you. And if you don't find a match for your team, it is much easier to find the right prices when you start to expensiv since you could makes your estimate on the amount of free seats. Also i think to high prices, don't make you loose so much money then to low ones.