Yep, that extra 400+Km up to Gladstone from Maroochydore is expensive.
That,... plus over 25kg..........
Aust Post won't take over 25kg on our account, but TNT will,...... with surcharges.
Working with 28kg, in a box 70x70x50 TNT want $142.33 at our discount rate.
Working with 24kg, in a box 70x70x50 TNT want $118.47 at our discount rate.
Starting to look like you may need to wait for a friendly traveller heading that way, or perhaps keep looking for a rim closer to home.......