It can be really expensive if you have to get a tradesman in to do repairs in your house. It can be something that many people dread. Obviously the tradesmen need to make a living and they are charging you for their expertise, but it would be good if they were not needed.
One way to resolve this is to find out how to do the work yourself. You can buy the appliance parts and then fit them. With the Internet, it is very much easier to not only find the parts for sale, but also to learn how to fit them. There are many workshops and video tutorials on there which can be very helpful. You may prefer to do a course and this would be just as good, if not better.