This is not a beginning of a beautiful friendship.
It's like saying "we are an X for really good people only", which leaves one to decide if they are brazen enough to consider themselves really good and try this wonder X or just accept the reality of being somewhat OK and move on.
Perhaps you are trying to be selective with whom you want to accept as clients and this is meant to be a filter, but it comes across as snobbish at best. There are other ways to phrase it without rubbing unwashed gray masses the wrong way.