Speaking of Seed-knee, I lived there for a while, and used to go busking at the Paddington markets on Saturday. We found ourselves competing for space with lots of other buskers, some of whom I got to know pretty well.
They were all young, and many travelled the world with their few possessions, picking up enough to live and move on. There were musicians, magicians, jugglers, comedians, from every corner of the globe. They would stay for a while during a tourist season, or the right season for bringing people out, or whatever, and then move on when the season changed. There were Germans, Swedes, Danes, Brits, Americans, you name it. Some had lived that way for 10 years or more.
I have often thought that these are the modern "swaggie" or hobo - living this way mostly by choice rather than necessity, unlike the street kids.
Regards
Chris