Just to be clear, Sherrena and Tobin are not tenants; they're landlords. Sherrena, an ex-teacher, is an African-American woman making a substantial amount of money renting properties in the predominantly black neighborhoods of Milwaukee, one of the most racially-segregated cities in the United States.
Given the chronic shortage of affordable housing, landlords like Sherrena are well-placed to cash in. As demand vastly exceeds supply, Sherrena is in a position to make a small fortune from renting out sub-standard properties in run-down neighborhoods where no one would ordinarily choose to live.
The deep-seated structural imbalances in the broken housing market mean that Sherrena can count on a constant stream of clients desperate for somewhere to live. The high demand for properties, combined with a lack of proper protection for tenants, gives Sherrena the freedom to evict tenants pretty much whenever she likes. She knows that she can easily find replacement tenants, and that she'll still be able to make plenty of money out of them.
Tobin is very similar to Sherrena in that he's a wealthy landlord making huge sums of money out of the housing shortage. Only he makes a living from the all-white College Mobile Trailer Park, the poorest trailer park in Milwaukee. Like Sherrena he can count on a steady stream of clients all desperate for a roof over their heads. And also like her, the accommodation he provides for his tenants is sub-standard and poorly-maintained. Tobin isn't worried, however; he knows that tenants are reluctant to kick up a fuss as they have no place else to go.
As well as the obvious difference of race, there's a slight difference in attitude towards eviction between the two landlords. Whereas Sherrena will evict at the drop of a hat, Tobin tends to be more reluctant to do so. Nonetheless, when it comes to receiving rent, he proves himself every bit as ruthless as his counterpart in the black neighborhoods.