Dedrood is right, have to upgrade in order and max at each level. If you do well then you should have more than enough cash to break 7000 by the second to last level.
Still, only a 3/5 star game due to lack of a save button and a total start over on failure.
Great controls and keeps you involved at all times, but a touch easy. I never lost a game, though I did have one tie my first season. Won my division 1 series with a scoring disparity of 43 to 3.
5 stars though, it's a joy to play.