My drive is around two hours one way but I only have to go LHR four times a month at the most which makes it fine. Whenever I do standby, and have two hours notice, I either drive halfway (although boring as it is) or stay at home if it's reported to be quiet.
How often will you be driving to work? If it's only a couple of times a month I wouldn't hestitate at all as you wouldn't have to relocate. If it's several times a week I would say it's a different story as you probably would be spending more time at work and on the roads instead at home.