Promote. That will give you a big promotion bonus and it increases all your revenues in div 2 from TV to merchandising. With the same size arena you'll be able to bump ticket prices quite a bit and gain revenue there as well.
Build your arena. Your arena is probably already a tad small for your current situation and I'm betting that if you check out D2 teams in your country, it will look very tiny by comparison. Also a bigger arena will lower prices will always out gross a smaller arena with high ticket prices. Long term that will increase your weekly profits quite a bit.