Not sure about the Hume since I haven’t driven it in years, but I regularly do the Western Highway, and WOW the fully loaded B-doubles are aggressive af. You could be going 20kmh about the limit and they’re still riding your ass. The only time they slow down is in the towns. There are way too many deaths on that highway.

I have been pretty lucky with the roos not jumping out in front of me, but I’ve had birds and emus. They are not fun.

I’ve just woken up so apologies if I haven’t understood and answered this correctly… But there are travel cards that people use to convert currency. I personally have used Wise and Revolut.