Hi, i'm close to upgrade my stadium to level 9 and currently my youth center and training complex are at 11/10.
Based on that their weekly cost I think that I can upgrade one of them without worrying too much about money (when I have it) but not both until I upgrade the stadium to level 10.
So I was wondering if there was a guide or some common recommendation about which level those buildings should have in relation to the level of the stadium.