I certainly agree with Kangomilks last post.Having returned in October after having lived in Adelaide for 4 yrs unless you have fairly substantial amount of money,you are likely to struggle in Adelaide unless you are both going to good jobs.
The cost of living in terms of food prices and mortgage rates,stamp duties etc are substantially higher than the UK ,WITHOUT A SHADOW OF A DOUBT.There are school costs,much higher dental fees,especially if your children need braces,prescription medicine costs for children.
When you factor in the current low exchange rate and the house price increases in Adelaide in recent years,it can make a big differance tothe quality of life you thought that you would have andthe one you actually have.
There are also other factors to consider as well.The current job situation here is pretty scary and therefore to leave an established position,with decent salary and benefits,is a big gamble,as if you had to return then the job situation may have shifted for you.
In my view in the current climate ,it is best to leave as many doors open as possible,ie dont sell your house if you dont have to and try and have a career break if you can ,to see if Adelaide suits you.Even if the jobs situation and other economic factors work out no one knows how people will be effected byother things such as homesickness.
You really do need a decent financial cushion as it can often take a lot longer than you anticipated to get a job.
Not an easy call these days.