thanks so much for your response!
from what i can see, if i draw a line straight down the centre of my face, my chin is angled to the left, and i think its the right side of the mandibular body which is the longer side if that makes sense? so in other words im pretty sure the asymmetry only affects the body.
In Australia I think Medicare covers a percentage of costs from what I've read, but yeah for the bulk of it i'm considering taking out a bank loan of some sort.
Getting X-rays done again soon and seeing the orthodontist in a month and a half so will have more info then.