I was also thinking that about the 1-on-1s. When I was in HS, there were three kids that shared an aide - they all took the same classes and the aide would help the three of them.
The district JJ goes to sounds like a mythical school district where JJ is the first child to require a paraprofessional - because otherwise, why wouldn't they have been providing one from the first day? Sure, they had a stack of resumes after Maya complained about Kenneth, but, yeeaaaah - Maya seems like the kind of person who would've arranged things with the school ahead of time, especially since the school had a meeting about Maya to prepare for her.
Though all of those students with disabilities suddenly transferring into the school would probably set off some alarm bells at the state - since they probably went from 0% to 5% in a year - or at least "hey they need more Section 611 funds!!!!"
Maybe JJ had all of the funds to himself.