I believe that you can save money with everything and whatever you do be it car service, shopping, home rebuilding and so on. Let me elaborate it with the help of an example.
If you own a car and you get it serviced on time via a mobile mechanic, and you never miss car service and car tuning. This will help you save money. This is because when the car is serviced and tuned on time, it eventually decreases the inspection, repair and maintenance cost. How? Because all the major and even minor issues are fixed during a car service and thus you save money by not spending money on car maintenance and repair very often.