Never have had any interest in getting Coach Madden but probably only gonna play SC from this point on in the year, so I might consider it since I don't have anything else to spend coins/training on. Does he cost any cap space and whats it take to boost players stats?
He does not take any cap to use. The only none player that takes cap is the Red Chems.Your basic chems such as team, or Play Fake/ sprinter do not cost anything. Also stadiums/uniforms do not affect cap either.
Your boosts for madden are the same requirements for SC as it is regular H2H. There are links to great speadsheets that outline what each one of chems of madden affects.