Rose.
Not "solid" advice, but just a comment from a teacher considering relo and looking into schools - there are several Montessori schools in Mount Pleasant that appeal to me from far away...check out the web.
Also impressed with University of the Low Country - I wish they went beyond 8th grade because it looks fabulous - lots of hands-on experiences (outside
and full language immersion. Check them out on the web.
Good luck.