Hi Wackyjacky,
We are staying in Joondalup when we get there for 3 weeks. Not sure where we will end up as want to have a good look around but think it will be definitely northern suburbs. When we booked it we had to pay half up front and the other half when we leave the uk. The guy is even picking us up from the airport!
We have the flights booked for the 1st October so still a little while away. Not sure about you booking accommodation with them when you get there as I know when we booked ours they are booked up months in advance.
Furnished rentals are not as common and will set you back a lot each month. If you are staying with a friend can't you find yourself an unfurnished rental and buy new stuff when you get there?
There is a large Ikea and other furniture retailers in an area called Osborne Park.
Sorry I never got back to you till now as I have just found the reply.
Take a look at
www.realestate.com.au
Sarah.