Maxillofacial Surgery to Move Jaw Forward and Increase Tooth Show Possible?

ive recently gone to a maxilo facial surgeon so he can move my jaw forward to increase tooth show, make my profile better and lift my nose tip from within (because my plastic surgeon has failed to do so from the outside). i wanted to know if these things are actually possible with this kind of surgery. Also just for the jaw surgery my out of pocket seems to be about 13500 australian dollars. is this a bit extreme for this surgery?

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