But that was the lure of ridesharing. Bring your own average car, no need to buy special equipment.
If you do have to buy a car just for uber, then you would have to consider the interest payments as additional cost (not just the depreciation of the equipment, which will be super brutal for a brand new car).
In any case, you are looking at something north of 50 cents per mile.
AAA has a nice breakdown: https://www.ace.aaa.com/automotive/advocacy/cost-of-driving....