The first league averages from last week are here:
Expenses
Player Salaries: $ 41 832
Staff Salaries: $ 19 553
Scouting: $ 3 437
Total: $ 64 822
Revenue
Attendance: $ 55 338
Merchandise: $ 14 698
TV Contract: $ 77 411
Total: $ 147 447
League Average Net Income: $ 82 625
It seems the average team is already spending quite a bit on staff (close to 50% of player salaries). How many have a level 4 trainer or better? Here's one.