The only thing I'd like to add is that if the car is used this often the utilization rate of the car would significantly increase thus causing the car to go in for maintenance more often. Average mileage on a car is 13,000 per year and if a car is being used to drop the whole family off and then do rides on its own you are looking at 70,000-100,000 on a car per year. You are encouraged to get an oil change every 6,000 miles. Not only that but power trains are engineered with a half life of ~250-300,000 before they become unusable