Yes, but loaded in the rental car cost besides a profit margin is a wide range of other costs not borne by a private vehicle owner. I understand the broad conce

Yes, but loaded in the rental car cost besides a profit margin is a wide range of other costs not borne by a private vehicle owner. I understand the broad concept but focusing on maintenance costs seems a bit odd when you are footing the bill for sales, marketing, rent etc. Whether these outweigh the cost efficiencies of fleet maintenance is an interesting question, though.