Party Hat Designs How To Design & Sell Hats?

How To Design & Sell Hats? - party hat designs

If I want to start a business with their own designs. I can not print these hats that I have little or no equipment.

But online sites, I saw it for T-shirts: This design allows you to create and sell on this site.

I want to be able to inventory the site and without design to direct the customer to third parties, hats print + ship.

Does anyone know of resources, knowledge on this subject? Thank you!