We now know when we will be where. The summary of the flights are:
Brisbane to San Francisco 11th Sept.
LA to Dublin 9th Dec.
Dublin to Heathrow 14th Dec.
This means we will be in the US for 89 days of our allowed 90.
The Dublin part was a happy cheap flight option.
We have also found a car we are going to buy tomorrow, an aussie classic, Holden Commodore of the '91 vintage. Fingers crossed with this!