I've run the numbers and as long as I get the +1 Yard coach, then yes once I spend my currency. So far I haven't spent anything
You do need to be going exclusively for the Red Players whenever Red is available though, and you do need the Yard Coach if you don't want to be relying on luck or getting enough incident currency
Best Case Scenario Red Player (+1 Yard Coach):
(10,870 / 41) x 5 = 1,325 yards achieved.
Best Case Scenario Red Player (No Coach):
(10,870 / 41) x 4 = 1,060 yards achieved.
Worst Red Player (+1 Yard Coach):
(10,870 / 49) x 5 = 1,105 yards achieved
Worst Red Player (No Coach):
(10,870 / 49) x 4 = 884 yards achieved
Absolute Worst Grey / Blue Player Outcome (+1 Yard Coach):
(10,870 / 78) x 7 = 973 yards achieved
Absolute Worst Grey / Blue Player Outcome (No Coach):
(10,870 / 78) x 6 = 834 yards achieved