I have some hustle and I know enough about sales to appreciate how little I know about sales, but asking a company to pay tens of thousands of dollars up-front for a product you haven't made yet is something I literally can't imagine. Why wouldn't the company laugh you out of the room? What's the upside for them to pay tens of thousands now, assuming huge amounts of risk, when they could just wait for you to build the product and then decide if it's worth buying? What's their upside?