Other than the piano tuning cost, there are several other things each of you who are a piano player should know and one of the things will be explained in this narrative. The discussion, then, will be in the following.
You need to realise that you can damage your piano in the process of tuning it. It could happen if you tighten a string too tight so that there is a possibility for the string to be broken. A piano is composed of hundreds of high-tension strings and to make any of the strings too tense is absolutely something not good that you should never do. Other than that, you could also hurt yourself if a string happens to be broken or if there is a move to a component which is improper, you could be injured or suffer other injuries. That is why you should be aware of this when trying to tune your piano.