This may sound like a silly question but i assure you that it is not. If you are a regular to the world of car hire say for family holidays, Work , day trips then you will be fully aware of how fast the charges can mount up and after you pay for the Car Hire and return the vehicle you have nothing to show for it. When paying ‘cash' or upfron for the car you pay just the pruice of ther car but with finance the apr will often add a few thousand to the price for the benefit of spreading the cost The decision of whether it is right for you to buy or hire a car would have to depend on the frequency of usage. If you were only ever in need of a car for a single day or two per year then purchasing a car  may not be for you but if you regularly hire , for over a week or two a year then Car purchasing may be a better option than Car hire for you.
What are the Pro's and Cons?