I'm in that situation (I think). My arena's the second biggest in the JBBL (and generally getting around 80+% - if I consistently get 85+, I'd build a bit more), and given my key guys are still 22/23, I'm a little away from competing at the top levels of my league.
To be able to afford the players I want for when they are ready, I have to accumulate cash. LOADS of it.
Flip side of that is that I want to stay at around 4th/5th.
http://with-malice.com/ - The half-crazed ramblings of a Lakers fanatic in Japan