1) The peering happens in Internet exchanges, there's no way a peering connection in an Internet Exchange costs 1000$, your range is simply ridiculous. Usually, it is fixed cost 1K or less depending on the locations of the router
2) Yes, you have to pay for bandwidth between the Exchange and your users. But guess what? That's what your users are paying for.
3) Not everyone stream movie in 4K at the same time. So you could optimize your bandwidth usage out of the exchanges. It is called "multiplexing".
Yes, the rest of the chain could be expensive, but that's what your clients are paying for. Net neutrality is about transparency. I have no problem in understanding that my 40$ connection will perform differently than an 80$ one. But you should compete in giving me the best service (where best is best for me, not universally) at the lowest price point in a way I could easily compare prices.
The problem, with my statement, is that implies Broadband Internet is a commoditized service. And that is all the battle about Net Neutrality, ISP doesn't want to act like commodities, they don't want to be your P&G or your ConEd. They don't have the structure to compete and instead of changing for the new market structure, they are fighting back. What they are doing is rent seeking. Good for them, bad for the economy...