Visa to Australia on compassionate grounds

[AlmostAway]

Posting here for traffic in hope of ideas.

My SIL, DH sister, was diagnosed with a very aggressive cancer about four months ago. She has been given just three to six months. It's all very sad. However, DH is beside himself because she lives in Australia. He is an Irish passport holder, but has been asked to pay AU$24k for the tourist visa.

Does anyone have any idea how he might be able to visit her on compassionate grounds? I have checked other visa types to no avail.

Thanks in advance

* My sister didn't get her Visa granted, she applied for a slightly different one and it went through instantly*

Entirely legal. She got her visa in different criteria

I'm now thinking it's 24 hours or 24 degrees or maybe even 24/7.

Something has gone very very wrong here! £24k for a visa? How do hundreds of students go travelling across OZ if that’s the going rate?

Bizarre!