An Australian friend suggested that I could move to Australia and teach Arabic in some community something (I don't remember) and that it has a decent income. They say it's expensive to live there. But yeah, that was just a passing suggestion. I'm not planning to leave here at all, at the moment.
It depends, the big muslim communities are mainly NSW (Sydney) & Victoria (Melbourne). The cost of living in Australia is getting bad, take a look at these links below. Like for example where I live which is Hobart Tasmania, the rental market is big demand but not enough properties and rent is expensive depending on where you choose to live. Apparently the cost of living in Australia is higher than the US by 10%.
Cost of Living, Prices in Australia - Expatistan
Cost of Living in Australia. Prices in Australia. - Numbeo Updated Jun 2017