I'm a business major and I would agree with what people have said here; you will need a lot of start up capital, it would be a full time job (or close to it) and it will be very risky.
However, if it is true that there is no such service in AUS and there is a demand for it (which there seems to be) you should do quite well as long as you stay on top of it.
Good luck if you attempt this!
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