It seems the idea you have is a way to pass on high-quality projects that you'd otherwise take, to someone you know and can vet. You'd likely have someone in mind already, versus having it be a huge network of other people.
Unless you wanted to hire someone who administers this group, and keeps it close-knit so that people don't dump crap projects onto good workers, or good projects to crap workers, I don't see how this can work. I don't see it as being able to grow very much besides a group of friends or former colleagues.
