Ringo
Contributor
pinklizard:Find someone living/teaching in Phuket. Since it is low season now, or at least going into it, it might be possible that you get a very low instructor-student ratio without paying the private supplement anyway.
But also make sure that the Instructor works for a reputable company and that he/she has a valid work permit. There are many Instructors living on Phuket who are not quite legit with the Thai regulations.
In agreement with Steven most DC's on Phuket could offer you 1 on 1 Instruction if you request it or at least small groups (2 - 4) should you decide to do the course with others.
Either way - enjoy it!