How long does it take the young boy to save enough money?

It took Billy two years to save the money for the pups.

A year passed. I was twelve. I was over the halfway mark. I had twenty-seven dollars and forty-six cents. My spirits soared. I worked harder.

Another year crawled slowly by, and then the great day came. The long hard grind was over. I had it—my fifty dollars! I cried as I counted it over and over.