$4.1 sounds high.
There's work for them as freighters Mon-Thu & assuming they are not subject to curfew @ SYD, there's huge demand Fri-Sun from sporting supporters groups not wanting to have to overnight @ SYD, BNE, MEL.
Catch is who's AOC could they go on ?
Much better to put on a NZL AOC for domestic Australian operations, but is anyone flying 146's in NZL anymore ? (think Vincent may have been last)