If you're doing a lot of early morning starts on a regional roster, you might be stuck with a taxi or the night bus as your only transport options.
That being the case, you might be better off on Lantau Island somewhere, such as Tung Chung or South Lantau or DB ( no taxis there though). Although a taxi from HK Island is not that expensive, it starts to add up if you have to do it 3 or 4 times a week.
If you lived on South Lantau you could get a car or motorbike which would be a lot more convenient.