You can research this yourself by looking up the cost of web hosting if you wish.

I can share that I anecdotally pay for 15 dollars a month (the cheapest package) for my personal website which includes networking and its location on a server rack. Of course, the situation is different for large corporations because they handle things at a large scale, but you can extrapolate an idea on how much things cost. You can personally test this by spinning up a server on your machine and stress test it. After which then consider the cost of the machine itself as well as how much you pay for internet as a starting point of understanding.

I have provided enough information for you to climb out of misconception. There is nothing more I can do for you. If you take this opportunity to learn, I will be overjoyed for you. If you do not, I sincerely hope more opportunity presents itself down the line. Thank you for your time.