Make sure that person isn't a breeder. They force their animals to breed.
You're just like another person who came on here looking for the same answers.
They got a cute skinny pig. Anyway, you can convince your parents to get one pig first, and then convince them that your pig needs a friend to be happier and convince them that he's lonely.
If you tell them that getting a cage from a petstore is usually too small and more expensive than a C&C cage, then i'm sure they'll let you make one.