IMMIGRATION CONSULTANT FOR AUSTRALIA?

HELLO

can any body plz tell me whether it is advisable 2 use a n immigration consultant or should a person apply on its own for immigration 2 Australia.

i m a professional accountant (including a relevant bachelor degree ) and i know that there r 3 institutes which can assess my qualification 4 immigration purpose .

i wanna do CA from Australia so that's y i m applying 4 immigration.

thx