If its all staged, they're not worth their pay as actors. And I believe the women on that show are known as "Ho"s. Not to be confused with the professionals who work near Kings Cross and the like.
6,785,000 USA citizens live in mobile homes, that's 2%, although on the radio (ABC Radio National) I heard more like 30% this morning, which was stunning. Anyway, nearly 6 million people can keep Springer going for a long time.
Not to mention
12.1 percent of USA citizens live in poverty, based on a total population of around 285 million, that's about 34 million people. They really don't need to worry about foreign terrorists, they're growing them at home.
data the easy way
http://www.pbs.org/peoplelikeus/resources/stats.html
data the hard way
http://www.census.gov/