The author seems upper-middle class, but any family who lives within their means can achieve this. Now if the state would stop incentivizing dumb families.

I don't trust many private schools to be substantially better than public schools. Same flawed authoritarian and artificial premises; lousy parents, teachers, and admin that squanders students' potential. Shared educational facilities for difficult subjects make more sense than 6.5-10 hour days caged to a desk.