You are not even close. The rotor/hub/knuckle assembly needs to come off
the coach, and the wheel bearings need to be removed with the appropriate
special tools to prevent damage to the bearings. Then, the rotor can be
removed from the hub, the lug stud replaced. Look very carefully at the
remaining studs. If they are stretched (by the same person who broke the
one, more than likely) then the last thing you want is to put this complex
back together and have another stud fail. That kind of thing often makes
grown men weep and curse. Sorry to be the bearer of sad tidings, but that's
the way stuff goes.