edward, with those hours most operators in the NT/WA areas would take you. Problem is you would most likely have to go remote. Chances of getting a job on the east coast with those hours are nil to not very likely.
February to March isnt a bad time to head up. The wet is in full swing it is unlikely you will get a job straight away. However start banging on doors and making yourself known to the operators in the area you have chosen to target. Don't neglect operators located in other areas, but concentrate on the local ones.
Don't kid yourself, you will probably have to go remote for a while, minimum 6 months, with the possiblity of 2-3 years depending on the company and progression with it and the industry the time.
I'm not sure on the legal side of things with regards to you being a foreigner (visa's etc), but so long as you present yourself well with an enthusiastic attitude I don't believe that it would be a problem once you have converted to an CASA licence then you are in the same boat a everyone else. If you want to do scenics, maybe a second language would be an advantage. For charter, no sense of smell.