Regular ipakita kariton Theory

Mr. Maellard says "Those carts aren't cheap." and makes Benson buy a new kariton in the "Busted Cart" episode. But whenever a kariton blew up and or crashed no one else seemed to care, and they seem to have an ABUNDANCE of carts available. Everyone says "The cart" but Maellard says "carts" which seems to ipakita that at least he is aware of the multiple carts. In the episode where Benson gets super angry, he actually destroys a kariton himself,but a split segundo later, Pops and Skips are seen driving a kariton with two rows, which shows that there are multiple variants of carts as well.

So why did he have to get a new cart? Could it have only been because Maellard saw it himself? Possibly the characters refer to "the cart" as only one can be in use at any ibingiay time? Even so, why does Benson want to "replace" "THE CART" with a new, madami futuristic one, implying that there was only ever one to begin with? Maybe he just bought ONE NEW CART, and possibly wanted to replace them all with the prototypes later on?

Also, in the zombies episode, Rigby says "Mordecai look! A cart!" using the generic form, indicating that somewhere there are madami carts.

And in the SAME EPISODE, beforehand, Benson says "The kariton needs a new suspension system."

So what do ya think, m8s? How many carts does the Regular ipakita Park really have?