You'll be fine on that salary. And as a single guy, go for the opportunity. Yeah there's a downturn coming but if you're comfortable with being able to move on if the worst happens then what have you got to lose.
Subiaco is a good option. As is leederville, mount lawley and Cottesloe. Or you could even look at the city centre apartments. Your rent will be close to double your allowance but you'll be able to afford that. Plenty of football teams about in all those areas as well.
Get foxtel or head to northbridge and you'll be able to catch plenty of newcastle games.
Dont make the mistake of moving further out North or South just to get more for your money, you'll feel very isolated. And why come all this way just to live out in a housing estate?
intruiged as to what you do that is so niche?