I love Treacy and most of the hats that were displayed at the wedding. Displayed seems a more accurate term than wore. I used to shop/wish at very upscale NY stores and never saw comparable hats. The hats I did see were very expensive. I am proud of my Ralph Lauren and Bergdorf-Goodman hats. Where I live now, no one wears a hat.
I did find someone who makes hats for the Kentucky Derby. They started at more than $1,000.
It sounds as a very interesting and creative job. May I asks how you landed in the field? I suppose Fashion Instiute of Technology might offer a course? It seems like a great niche area in the US.