RE: How will I ever get this buck??
Maybe try to setup on the downwind side where you can see a little ways, and rattle? He may not like another buck or two in his bedroom.
Other than that, are you sure you don't have a buddy with a gun capable of that shot, and maybe a rangefiner you can borrow? Maybe a morning at the range will convince you a 200 yard shot is possible?
Good luck, hope you get hime.