If you come on holiday, you need to look into things as much as possible.
Wages, flights, taxes, property prices, car prices etc. Don't get tempted & convert them to UK pounds, as it will seem cheap/er. Find out what you/dp would be earning & base the costs on that.
Don't just come for the scenery & decide you can do it. The reality of living here is different.
Dh has family here, he lived here from 3 - 21. We had dd in 2003 & came for a visit 2005, he decided then that he wanted to come here & live again as he missed family & wanted dd to have a better life. We have been here since Jun 06 & he is unhappy, wanting to return to the UK. He can't pinpoint why, just that things were not as he expected, although he has enjoyed being with his family.
We are in Adelaide & although others have said that we get seasons, we don't as such. They all seem to merge together. It is also said that it is quite an English place, but I don't see that. It is Australia! The outdoor lifestyle I do love, but you have to like heat. We have had lots of 38+ days here this summer & generally confined to the house on the hotter days. Which is really like the UK, just the reverse form the rain.
Since we have been here I have watched property prices rise from around $180k to $250k for a 3 bed. That, convereted to pounds sounds good, but it depends on your salary here etc. We looked into buying & our monthly payment was excessive, it seemed that over 20 odd years we would be paying back alot more than we borrowed.
Yes, petrol is cheaper, but other things aren't. Dh got his first car insurance breakdown a few months ago & he had to pay GST [like VAT] and stamp duty [on car insurance]. He also paid GST & stamp duty when he brought it. So although it was cheaper, he paid 2 taxes at the time. Car tax isn't cheap either. And works out more a year here than in the UK.
I love it here, but will return with dh if he is really still unhappy.