If you have teachers coming to your mansion, all you have done is to build a personal private school. Completely out of reach to 98% of the population.
Remote learning is not though.
I'd wager that 25 parents banding together to hire a tutor might outperform a typical classroom, if it was a biased sample towards people who care. I'd trust my parents and a group of like-minded parents to pick out a good educator better than the typical teacher, teachers aren't the sort of people I would recommend to teach children how to think.