To me, this really shows that marketing is now the most crucial skill. It has become easy and affordable to design products, the process is now almost fully commodified with all those OEM and production services. The only thing that now stands between your idea and financial success is your ability to reach the target market, i.e. marketing.

Also, such a slick KickStarter campaign typically costs $10k plus ad spend if you buy it from an agency. Roughly 25% of the final price will be marketing and ads. I know because I've seen first hand that you need a 3400% mark-up on the production costs to profitably sell bikinis in the US.

These hangers will also likely cost <$0.1 to make at scale. It's the initial investments into CNCed molds and the upfront marketing that determine the price.