One of my ancestors owned five slaves, and they appear to be a family. Why would someone own a family? What purpose would it serve?

by greree

This was in 1850. He owned a 21 year old woman, three boys 15, 12, and 3, and a girl, 9. As far as I can tell this was all he owned. Why would someone do this?

Edit: Changed date.

rutnatuM_ainmO

Where?