You either get a job through an employer, and they may pay for your housing etc, and a small er wage, or you may get a good wage, which you pay for things yourself, or your employer may give you a wage and a lump sum to go towards housing etc.

Its not as simple as coming here and getting a job.
Sometimes if you get a job while living here, you will be given a job, and paid on a local contract, (little or no benefits) or if you secure a job whilst back in Oz, you may get relocation paid etc.

Also to work here you need to have a sponsor (ie an employer,or start your own business....which means a local Emirati owns a part of your business or you do what we do and pay our sponsor a certain amount each year to have our business here)

There is a lot to weigh up...but 1st talk to an accountant and discuss the best ways to earn money OS without paying too much tax, and what the implications will be for you to bring back to invest.

Also check out some job websites, to get a feel for what wages may be like.
As for rents etc, have a look at Dubai Property Real Estate – Rent, buy or Sale Properties in Dubai, UAE Apartments and Villas with Better Homes. Manage or Invest in Dubai Property with us. to get a feel for prices (you will need to divide by approx 3.3 to convert to Oz dollars) - and remember its paid a year upfront