And moving to the US with your whole family is not a cheap or easy operation; it costs money, you need a job, a house, and from abroad, a working visa. I find it hard to believe he was a poor kid.
It is not an easy operation and neither cheap. However, in those days getting a working visa was probably a no brainer. I really applaud his parents for taking that route. Usually employers sponsor the airfare. Still, a very gutsy move.
One of my uncles went to Carnegie Mellon on a full scholarship in the 80s.He hailed from a village where education was the least priority. He was very poor but figured his way out without any money. It can be done.