The guy I spoke to went over on a 482 and now after 3 years with the same employer has just got PR, it sounds like most employers would offer a 482 and circumstances are similar to his so fingers crossed PR would be an option, I love the idea of giving our kids due nationality, even if we decide to return, so fingers. That said we would as you suggest rent our house here until we knew we could and wanted to stay. Take it as a 3/4 year adventure with a possibility of staying or returning at the end.
It seems likely my wife could also get sponsored on a 482. So another option is we all come over on that and I look for work as a contractor, which is what I do here in UK.
Work may well end up dictating it but we want to know where to start looking for work, if we don’t find it in our first choice we may have to look elsewhere.
Thanks for all the advice everyone.