Forcing young adults back home? H311! I’m still trying to get one to leave the nest!
Try charging rent on par with the local market. Try not supplying food, laundry services, etc. Make them pay a share of the utilities, etc. In other words, remove the economic advantages to staying at home. Or just kick him the hell out. Then again, when I turned 18, I couldn't WAIT to get out on my own and never looked back. Is it any wonder we're becoming socialists when we have generations of people with no taste for freedom and independence?