The irony of Dave telling Ed to "coach his team" when the entire issue is that Dave is buying athletes vs coaching/developing them. Dave's version of coaching is staying out of the way of his shiniest new purchases and not screwing things up.
In terms of legality, there is this thing called ethics that some of you aren't aware of. It has to do with moral principles that guide behavior to promote fairness and order without having to be told what to do in every situation (aka laws). In this case, what is the end game when everyone "coaches" the same as Dave because it's technically legal? Will it be 80-90% foreign athletes competing for American championships? How is that good for us as Americans?