Beaufort/Morehead City to Charleston is 6 days. 3 more to Savannah. Haven't done the ICW from there to Cumberland Island/St Marys or Fernadina Beach, but reckon 3 days. 'Nother week to Miami.
Savannah to St Augustine, St Augustine to Fort Pierce, Fort Pierce to Miami are all easy overnight hops outside.
Savannah to St Augustine, St Augustine to Fort Pierce, Fort Pierce to Miami are all easy overnight hops outside.