patio11's already saved over $2k apparently, maybe he'll do a more formal write-up at some point. (A couple threads here https://x.com/patio11/status/1977425626584711668 and here https://x.com/patio11/status/1978168404793037087 )
You can pay for K-12 with 529 or Coverdell ESA funds. But neither allows deductions for contributions. Only growth in either is tax free (assuming it’s spent on education expenses).