It’s probably close to 80% re-purposed materials.
The pit comes off the wagon.
Each wheel is removable with a key pin.
Front axle also can be removed.
Handle hooks in tongue and is built also to be used as a fire poker.
Front axle pivots for easy maneuvering.
A plasma cutter was used to cut out holes to mount the buffalo figures.
The short tongue can be lifted and easily pinned out of the way.