Haha some of these I questions I dealt with before choosing my own team.
I think you should go big in attack and go ok at the back. I wouldn't like to comment on the forwards as they are all go forwards.
I think 1 good goalkeeper and maybe a cheaper one is ok. It's the same in midfield for me. You can go for the 4m midfielder who might not play and maybe not worry yourself too much on the other good expensive midfielders to select.