This is what I would go for. Slowing building up each section and you are ready to bring in max. value for your home games with the promotion bonus you get in the first half of the season at the new division.
I also recommend building in small increments so you are ready for either the next home game (6 day estimated building time) or the next next home game (10-12 days building time).
This does cost quite a bit of coin, but if you are thinking long term, this is the best for your team. Pretty much what I did except I lagged behind in lower tier and am just now polishing that section off in Div 1 with the TV revenue each week.
4500 450 50 0 (starting values)
5500 1500 100 10 (immediately get to this)
7250 3000 200 20 (when ready to promote to Div 4)
9500 4500 300 30 (when ready to promote to Div 3)
10750 6000 400 40 (when ready to promote to Div 2)
13000 7000 500 50 (when ready to promote to Div 1)
If you remember me, then I don't care if everyone else forgets.