miller
Someone who builds or repairs wagons/carts is a "Wainwright"
Melex
A person make running vending carts can make about $10 an hour
There are a few different names for food service trollies. They are called food service carts, or Queen Mary carts. The carts used for clearing tables are called bussing carts.
the person who makes spelling mistakes is called cacographer.
The person that makes and sells sweets is called a confectioner.
Believe it or not, it was the "Cart Wheeler". Although many "Coopers" also made wagon wheels, from what I understand.
...a cartel?
A person who makes saddles would be called a Saddler.
A person who makes glass is a glassmith if that helps
A person who makes whiskey is called a distiller.