Okay so it is $50pp for a bag

(incidentally you can do the maths either way you saved 2X on the flights so consider 2X on the QF cost, or you take it per person, either way the saving is exactly the same).

Lots of people either take a car service or rent a car from LST to Devonport to save money, which would only be a 1X cost as presumably you would share a car?

Thanks for sharing your personal speculations on Rex. Given they are buoyant by $200M in government funding, you could also make the reverse argument

end of the day you have options and personal preferences, and a general forum is simply here to highlight all options so you can make an informed choice.