As long as the bearing is OK, you can repack and tighten the outers in just a few minutes. For the quickie job, one doesn't even have to remove the wheels (if you have wheel covers that is). I haven't a clue as to what it might cost at the shop, that's been a home job for me, well, forever.
If the bearing is too worn, then the rotor has to come off, the races need to be punched out, then new races set in, plus a new seal on the inside. No idea what book time might be, but with parts in hand, maybe an hour a side.
'73 280SEL 4.5 (9/72)- RIP
Only 8,173 units built from 5/71 thru 11/72
'02 CLK320 Cabriolet - wifey's mid-life crisis
2012 VW Jetta Sportwagon TDI...at least its a diesel
Non illegitemae carborundum.