Return to Oz after one week on TV

[Loubear72]

Hi everyone, has anybody come to australia on a tourist visa flown out and then flown back in a week later on one way ticket, my fiancé is here at the moment waiting for his PMV, his 676 3 month stay is over soon so wanted to go back to uk for a week then come back. We applied for PMV on 9/10/12 have emailed CO for estimated grant date but just got an automated reply about cases being processed in order. We have a month old bubba and I need the help and an going back to work next month so fiancé is gonna look after bubba till his visa is granted, he has a letter from TV CO saying they have no consideration not to grant PMV but we still have to wait in line, any advice would be brilliant, thinking maybe just best to by return ticket and cut our loses and then fiancé can go to NZ to be off shore for visa grant