Knowing how to do things yourself will save you a fortune as there is always a reward, literally for the labour you put into doing something on your own.
We have all come across that situation where you take your vehicle for a simple oil change and you end up doing more than just oil change. One such man encountered the same experience where the mechanic suggested that he change his wiper blades as well. Each blade cost $12 and in total he had to spend $24. He immediately declined the offer and decided to change the wipers himself.