"There is something magical about Soweto. Yes, it was a prison designed by our oppressors, but it also gave us a sense of self-determination and control. Soweto was ours. It had an aspirational quality that you don't find elsewhere. In America the dream is to make it out of the ghetto. In Soweto, because there was no leaving the ghetto, the dream was to transform the ghetto.
For the million people who lived in Soweto, there were no stores, no bars, no restaurants. There were no paved roads, minimal electricity, inadequate sewerage. But when you put one million people together in one place, they find a way to make a life for themselves. A black-market economy rose up, with every type of business being run out of someone's house: auto mechanics, day cafe, guys selling refurbished tires."
This quote is interpreted as the level of poorness, that Trevor used to live in Soweto, and it was hard for the people to open up real stores, so they had to open their shops in their own home, and it can be interpretated with the apartheid, and its influence on black people.