I agree with the people who are thinking that this seems like a bad idea. You've written that he enjoys school and doesn't want to homeschool, so I'm confused about why you'd want to force it on him.

Do they have after-school study hall programs at his school? My son's did. The kids would all go to a room and do homework under the supervision of a teacher. If his school has this (I think most do) you sign him up for it? Then you might not have to fight with him so much about homework.