I'm not actually in Adelaide yet but will be flying out in July. We're moving to be close to my husbands family - he's from Adelaide but has been in the UK since 1999. Because of where we live now and where we live in Adelaide we are going to probably have a smaller house, less disposable income and work much further from where we live (I work from home at the moment and my husband works 10 minutes away).
However, the skies in Adelaide are bluer and you see more of them, the days are longer in winter and shorter in summer, there are far more parks and open spaces than here, you can park for free at the beach if you avoid places like Glenelg and I love the city and always feel at home when we're on holiday. My husband mood is strongly influence by the amount of light around so we're hoping the improved weather over there will mean being happier and more relaxed even with less money.
You can park for free in Glenelg, too!!! Agree with everything else you said, btw!!