Earlier quoted context omitted.
I'm adressing the original comment (by movedx) of giving channels on YouTube the ability to disable ads and let the channel provider/creator eat the cost instead. So yes, I'm basing my calculations on YouTubes service. What you're imagining is obviously an option for individuals that only want to serve to few individuals at a time, but is entirely offtopic to what was proposed here
I think if you reread the comment you'll find that movedx didn't propose what you think he proposed. At no point did he suggest what you seem to be cost-estimating. He suggested $100/month for 300 videos and noted that he was experienced in content creating.
Literally the the first paragraph