I don't think I could hire another sub, but we make sure the company we with knows to pay us /see us as seperate entities, two separate subs.
He actually doesn't provide tools or transportation right now. He's an old friend of mine. I'm sort of creating a work situation that he can learn about climbing safely and about arboriculture, get paid good by the people he provides the service to, and get the ball rolling for himself as a sub. All that in exchange for his excellent groundman-ship (tells me when i can just blow out a top somewhere, runs the 1 or 2 other people on the ground, know when to drag or stage or when he came chip. The little things that save so much time, for thought, and potentially hassle.) and his soul.
He greatly improved productivity below me, so that increases my productivity. Results one day with out him, then one day with him can convince most that he's worth having too.