What is special about your idea or what makes it special because, as far as I know, there are many de/central markets that provide such services, for example but not limited to bitify.com/
Building a market from scratch is an expensive process, so why not try to find a way to use bitcoin on sites that currently not allow it.
So you had a conversation with Elon Musk? What are you doing here then? You could both bring down amazon together, you don't need us here.😉
This part that he mentioned is Red flag, enough for any investor to avoid talking to him.