The aircraft that Qantas needs -big long range twins- both have delivery constraints that seem a bit unstable. There are big 777-9 and A350-1000 orders from the ME3 that could easily shrink or delay which could free up slots. If they don’t Qantas is really screwed.
There are circa 100 Airbus orders for the various JQ entities...if a conversion of some of those to 350s is even possible the first delivery would be 70 months away, assuming the Airbus order book stays stable. There are earlier 777 slots but then what happens with the 100 A320/1 order? Take them all?
In six years QF will lose all of the 747s, the early 330 deliveries will be time-ex or close to it and a lot of 737s will be worn out too.
Regarding virtual airlines: If Qantas had no planes what the hell would a customer even need them for? I might do that myself since I don't own any aeroplanes either. Hey everybody! Look at me...I'm an airline! Weeeeeee!