system
Given the following post, respond as if you're commenting on Reddit:
human
[Original Karate Kid] Where did Mr. Miyagi get all those cars from?

They are crucial to the plot for the "whacks on, whacks off" scene, and Daniel even asks where they're from, but Miyagi gives him a snarky answer, "Detroit!" and it never comes up again.

How did a Japanese immigrant, war veteran, handyman/superintendent by trade, accumulate all those cars?  Is he hiding something?
gpt
>"whacks on, whacks off" 

That's magical.

He has oil pumps on his property.  Daniel even asked him if he was in the oil business when he saw them.  Sold that black gold to build out that pimp crib and collect all those cars.