I had a 2 week trip to England last May and that was in the $18k living expenses. The cost was about $2k. $800 on plane flight. I stayed with friends in London and rode my bike the 400 miles to Northern England to visit relatives. I stayed in B&Bs during the ride
We have no friends/relatives in Australia. For those that have traveled there, you know that to get to any point you need to travel via rail/air. It's not inexpensive, in any manner.
It's a wonderful country, and I would recommend it to anybody who wishes to travel. Regardless of that, depending on the route taken (and the transportation in country) it can be quite expensive.
BTW, we've traveled to England (and the ROI, in addition to Scotland) - hey, I even drove in the "wrong side of the road" in ROI and Scotland, but it was much cheaper.
It's great if you have family/friends while traveling; however in our case, we normally spend $15-20K or more on our annual trips.
A bit expensive as most would say, however we look at an ancient laurate that stated "those that have not traveled are only on the first page of life" (we've turned many pages, and will contiune strive to do so
)...
We are fortunate in retirement to travel; of course, it was always considered a "normal expense" during our pre-retirement years, so it's not something we have not done before....
Now that we're retired, it isn't an additional expense - rather than just "more of the same"...