Hi Alibi
Can't help you on the aviation front but your wife can work as a solicitor in Australia, although hours are reportedly longer in Oz (but that's Sydney, Adelaide may be lower key) and she would have to get all the paperwork done with the Board. If she's a barrister the lag in building a practice may not be worthwhile for only a year. Another option would be to skip the paper work and get a (often very lucrative) job as a high level paralegal: sometimes less responsibility can be fun if you're only in town for a year and want to have some fun.
Good luck