“So if someone cannot afford full yeshiva tuition, they should send their kids to public school?”
I would like to believe that no matter what neighborhood a person lived in anywhere in the world, if he was an ehrlicher yid who was forced by circumstances beyond his control to send his kids to public school, that the frum community would step up and make the appropriate arrangements.
That said. If public school is the only option, the person is living in the wrong city.