It doesn't have to be all or nothing. I would recommend commuting 2-3 days/week both ways, or combining bike commuting with driving. Eg, drive to work with bike on rack. Ride bike home that afternoon and back to work the following morning. Repeat as often as desired. For me, trying to ride 60 miles/day would end up seeming like a chore. It would take so much time out of my day that there wouldn't be much left for anything else. I have ridden that far day-after-day on week long bike tours, but that's on vacations where all you have to do is eat, drink beer and chill out after riding. That's totally different than doing it daily commuting, when you have to work 8 hours during the day and then come home and fix dinner, do chores, pay bills, etc.