[novok]

There are two kinds of 'low income.' There is a working-class neighborhood where people are not rich; life is hard, and stuff is a bit run down, but people are normal. Employed-ish, don't start fights and are respectful. The sense of community and friendliness might even be better than a 'normal' place because you need community to survive. Living in these places is fine. Then there is the kind of 'low income' you describe, which is a very different kind of place and people.

When people talk about this topic, people get into big debates about it because they are thinking of 2 very different kinds of low-income places.

[tripletao]

The comment you replied to said "income-restricted", so they probably mean a building covered by government programs that give preferential tax, planning, or other treatment to developers who commit to below-market rent, with tenancy restricted to households meeting income limits.

These are common in large American cities. The problem tenants are a minority, but the landlord lacks the usual incentive to address them since the building will always be full, since it's below-market. The landlord may also be a social benefit organization that's politically disinclined to evict.

Non-market housing tends to go badly in the USA, including programs closely resembling those that have succeeded in other countries. The reasons for that are complex, though I strongly suspect that the weak mental health system (many of the worst problem tenants would be institutionalized elsewhere) contributes.