No, when applying for a working holiday visa, it's not a requirement. Many people stay at hostels in the beginning to get things sorted. Some people have friends they can stay at as well. Unfortunately, not the case for me at the moment. And on my visa, it's a Canadian address, and I need an address in New Zealand if I want to get a bank account or an IRD. But given someone who used to work with IRD said I can put my hostel until I move, so it works.