Where do all the cars come from for monster jam?

Monster Jam trucks aren't mass-produced like regular cars. Each truck is a custom-built machine, meticulously designed and constructed by specialized teams. They aren't sourced from a single factory or supplier; instead, they're built from the ground up, often incorporating components from various sources and using a lot of custom fabrication. Think of it more like building a one-off race car than buying a car from a dealership.