I trade for others as well as my own account. Been doing it for several years. Depending on how you structure the agreement and how you obtain accounts, it is not a problem.
Of course not. Just tell them you make 6 ES points every day, and ask them how many contracts they want you to trade for them.
Why not call the FNRA folks and ask them? It is amazing to me how so many people have so many questions, but do not finally figure out that they should call the source directly. But you had been licensed for EIGHT YEARS and still don't know what to do? *shakes head*.