I think it's much harder to remain motivated on your own project on a completely independent basis. This seems like fun, in that he's "being paid" (by himself,

I think it's much harder to remain motivated on your own project on a completely independent basis. This seems like fun, in that he's "being paid" (by himself, admittedly) for the 25 hours and might continue work at his normal rates, so it's extrinsically motivating, but still his choice of work, instead of being whatever-he-can-get-hired-to-do, which is the usual freelancer dog's breakfast.