I do NOT want to do K12. It would be a disaster for me professionally to pull him from school.
Bear in mind, it can be time consuming, just like homeschooling, depending how fast and cooperative your kid is. Some people do manage while working fulltime, but it's a struggle.
Ah, well--I live in a verrrry charter-friendly state...
Even so, there could be an enrolment cap. You need to get well informed about what it takes to get in, including possibly during mid-year. In it's first year, I believe that ours was letting people in mid-year to replace those who bailed out becuase they couldn't handle it, but then the latecomers couldn't complete a year's work in the available time, so they became reluctant to let people in mid-year.
What is this? "A robust Advanced Learner Program "
It's k12.com's hype. But there is some truth to the claim that radical acceleration and self-paced learning (varying across subjects) is possible and does happen.