On Nepalese passport, travelling Brisbane - Kathamandu - Brisbane, do I need visa for transit hotel

I have Nepalese passport, travelling via guangzhou airport for Brisbane - Kathamandu - Brisbane. On return journey from Kathmanadu, there is 15 hour transit, I am planning to book transit hotel looks like most of them are outside airport, Do I need to obtain entry permit as the period is still below (24 hours) but may need to pass coustoms. Please advise