Quote Originally Posted by alines6 View Post
Which facilities are most important?
All of them, for varying reasons.

Medical gives you Red packs and reduces the time for recovery from injury - you will get an extra Red pack if you don't get any bookings in a match you attend.
Training gives you Green packs - if you are present at the match always do one substitution - this will give you one more Green pack.
Commercial gives you extra money on your home match day, the amount varies depending on your match attendance.
Improve your pitch to reduce the chances of injuries happening.
Add extra seats, update the stadium to give you bigger attendances and therefore more money.
Improve parking as this facilitates the attendance increases for your larger capacity stadium.
Maximise the revenue from your matchday attendance by increasing your ticket price by one each match until attendance starts to drop off then go back one.
The Youth setup gives you young players occasionally, useful in the early seasons when they will be of a quality similar to the main squad, but once you have mostly 5*/6*, the 'free' one will be useful for signing and selling to raise funds.
Stadium lights and scoreboard don't appear to affect anything but you will need to upgrade them eventually to do stadium upgrades.