well i dont think you are that good at math. having a coach that earns 30k per week at the end of season means that you will loose 160k per season (if you had an 20k/week coach). So unless you pay for that guy less then 160k then its worth it. In case of the guy that you commented on its16x14k so its less then 224k and thats not even near
Thinking doesn't hurt...
I am not sure there are 'off-peak' hours. Since this game is global, its high noon for someone's team somewhere in the world. I would be interested to know which time zones around the world have the most/least users. Unfortunately this might require lots of thinking, and I am afraid it will hurt.