Hi ! You can actually hire a CPAP machine very cheaply via the local hospital provided you are on a Centrelink benefit.I went through this process a couple of years ago and it goes something like this;
You first see your local GP who refers you to a ENT specialist. The specialist takes your medical history,etc..., then arranges for a sleep study for you either at home or in a hospital sleep lab. After this sleep study ,you see the specialist again to get the sleep study results.If you are diagnosed with having sleep apneoa, you will be directed to a local CPAP machine supplier.Do inform the specialist that you in receipt of a Centrelink benefit as he can also supply and sign a form which you can sent to the power supplier for a few dollars discount off your electric bill due to the CPAP machine been classed as medical equipment.. The CPAP supplier will then provide you with a modern CPAP machine ( usually a Resmed ,plus humidifier ,mask, tubing,etc..,) and they will set the machine to the rate specified by the ENT specialist. After trying the machine out at home, you will have a follow up appointment with the supplier so they can assess the nightly results and make any rate adjustments if necessary, plus answer any of your questions. I ended up been unable to tolerate the CPAP machine, so I never hired one, but the yearly hire cost was well below $100 from the local hospital, which is far cheaper than hiring from a pharmacy. Should you want/need to buy a CPAP machine outright, there are plenty of ad's on the internet, plus the local Gumtree. Do your homework and as ever,buyer beware.Good luck !