It involves everything from mowing lawns to weed whacking and watering plants. But what are the duties of this oddly cool job? One final option would be to register your car as an airport shuttle service vehicle and take people to and from the airport. Though this is what my CPA and many other tax lawyers have told me, you should never take legal advice from someone who does not know the laws of your specific jurisdiction. I took that as a bad omen. What about offering a designated driver service where you offer to drive people home in their own vehicle?