fkn amature move.
go to UK, buy a $30 flight to Netherlands, buy a brand new RHD Merc/Audi/BMW in pimp spec limited edition (something hard to get in oz, like one of those 11ty hp turbo diesels or someshit), jump on a ferry back to the UK.
BAM, car in the UK without paying retarded UK taxes.
A year later... BAM, car in oz that is worth double what you paid for a year ago. Flip it and do it again for the other year of your remaining visa.