“Do parents and schools receive extra money for kids with autism? If so, we’ve found our answer...”
In my experiance, this is a white welfare scam and a means for parents to get their (completely normal) children a better education via a smaller teacher:student ratio.
When I see people get the autism tattoos for relatives with fake cases, I have to laugh; the children in question are behaving as normal “only children” who have both parents working full-time (so they are raised by television).
Yes, of course schools get extra money to educate disabled children. They require more attention. I don’t know about other states, but in Ohio, state law requires the school to educate autistic children at 3 years of age or the state gives them scholarship that can be used at certain facilities.