And better is expanding to a point were you can get a return on the investment as quick as possible.
That's not 100% true, if you have a small arena and you will improve your team, one day you will have to use money that could be useful to expand the arena for your team, if you wanna stay competitive in the higher divisions; in BB is better to build an arena when you can and usually this is at the beginning of your experience.
1990-2022 Stalinorgel - https://www.youtube.com/watch?v=pV-Xppl6h8Et