I have been aware of and interacted with the homeless, street people and hobos in Amarillo since the mid-1960s. The hobos who used to camp out under and near the Line Street overpass over the former Rock Island Railroad line were among my favorites to talk to and learn from. Changes in railroad shipping practices since then have all but eliminated the notion of "catching a freighter" to travel cross-country.
The street people of Amarillo today have their own reasons for their state of affairs. Some actually choose to live in tents or makeshift shelters in the same location for years. This is the case with "Papa" Wayne, a Vietnam War vet I have known and interacted with for more than a decade.