As others have noted, the depreciation and savings analysis is very misleading.

Bottom line is that without the cars, he spends about $390 / month on Uber, and likely that average may have increased given the extreme low summer outlier months. In some areas where parking or insurance is expensive, this could mean large savings. In my area (Austin, TX), the all-in cost of owning a car with insurance is minimally more than this figure. You could lease one brand new, moderately priced car + average petrol costs for about the same amount. You could buy a cheap car and depreciation + maintenance would be even less.