E.g. pets. Most rental companies don't allow pets in their cars. And there might also be situations where the next rental company is far away and you'd spend a

E.g. pets. Most rental companies don't allow pets in their cars. And there might also be situations where the next rental company is far away and you'd spend a lot of time going there. Depending on how often you need a car, having your own in front of your house might be the better choice. Same for long holidays where the rent for a car can easily be a big chunk of your holiday budget even if you only need it for a few days during your trip.