VFR is correct is his diagnosis; the bearing is shot AND you may need a hub. We have seen hubs friction "machine" themselves in the bearings when those failed. I don't see the need to do both sides at the same time. As a precaution , if funds are available, okay. But the bearings are really tough and last a very long time. There is no time overlap , other than a car going up and down on a lift, so no savings in doing both at one time.
The job itself is indeed a PITA ! Amatuers best leave it to a shop that has done them before- you don't want to damage more than you fix
