I used to decorate & sell cakes years ago. Everything from basic birthday cakes, sheet cakes, shaped cakes (think mickey mouse, etc.) to wedding cakes. Had to give it up years ago as my hands & back can no longer take it. My all time favorite cake I made was a strawberry wedding cake. It was 4 double layers high with 144 marzipan strawberries I made in different sizes.
The largest wedding cake I made was over 6 feet tall. That one was a nightmare delivering, even in sections.
I still have some of my decorating tools. I did sell a lot of it years ago. A lot has changed in cake decorating since I gave it up.