You would be entitled to iptaas or pats allowance. ..or whatever called in your state. It can provide assistance with travel costs and accommodation. If needing 5 day stays they can bill directly most areas...so it's just meal costs, then you claim back your travel costs. Anymore than 50km from nearest treatment centre I believe you are entitled. Most areas have accommodation for people undergoing treatment. Bc nurse may know or cancer council also. Radiotherapy department also.
https://www.qld.gov.au/health/services/travel/subsidies/