Hi Moomincorn - Are you in NSW? Definitely check out the IPTAAS - which hospital will you be having your treatment? Some have accommodation in the grounds for patients undergoing radiation & other treatments.
I was at Port Macquarie Hospital for my Rads & stayed at the Rotary Lodge, going home on weekends. It makes it much easier, not having to travel 1hr each way.
Even if it is not 100k each way, IPTAAS will still pay for consecutive trips that total over 200k within a week ... so you'll be covered xx
The details for all state's travel schemes is here:
https://www.ruralhealth.org.au/wp-content/uploads/2024/09/PATS-Fact-Sheet-and-Guide-2025.pdf
Take care & all the best