Food say at $40 per dayx 28 = $1120
Dare say you will be SICK of Macca's at the end of the month!
One other thing you forgot is that SHOULD the training be in MEL instead of SYD, then you will have to pay to get to MEL as well.
And what GA employer is going to give you 4 weeks off to do a DHC-8 endorsement ?
A "conditional letter of Employment" probably will NOT make the endorsement tax deductable! (not too sure about that)
AND... the most important cost that you have forgotten is BEER!!! who EVEr heard of going 28 days without beer ? and $40 ain't gonna get you maccas AND beer!