Would you say San Francisco is the new Detroit? Something like a mill town?
I've also never seen a tent on the sidewalk in Detroit. South of Grand Circus Park is a big startup area. To be fair I have found trying to cross the park in the evening to reach restaurants on the other side I've quite often had to deal with very aggressive panhandling homeless people. I've never encountered this problem elsewhere in the city.
Here's another video by the same guy where he meets an ex-convict who is building a real estate empire one house at a time.