Sure, you could. But it really isn’t designed to work that way, and you probably won’t really get a full sense of the impact of an intentional mentoring group.
The best way to test out Radical Mentoring is to start with one group. Grab 4-8 guys and mentoring them for a season, using our 9-month recommended track. Mentoring is just modeling “this way of life” to others. Just go for it.