Regarding the economy and extra money for the extra playoff game: I don't see it as an issue, the teams in the playoffs have usually higher expenses.
I don't see how that stretches managers in their team management skills
Below is a suggested finals schedule4/11 - round 1 PO7/11 - round 2 SF game 18/11 - round 2 SF game 211/11 - round 2 SF Tie Braker14/11 - Final game 115/11 - Final game 216/11 - Final Tie Braker