Absolutely no relevant experience here, but one question for potential teachers leaps to mind. I've seen many comments in this forum from homeschooling parents pretty freaked out by how fast their child is blowing through curriculum, how quickly they need new material, and how deep and wide the parents need to go to feed the child's demand for learning. And those are *parents*, who should have some idea of what they're in for.

An experienced teacher may expect to work at a certain pace, use certain kinds of material, focus on certain kinds of tasks and questions.... You would want to find a special kind of educator who could cope with tossing most of their own expertise out the window and accepting the child's pace/ approach.