Easy reach by taking Bus 380 from the airport to Elizabeth Quay Station in the city at A$48 standard and A$2 concession price for Seniors (65+) though some said that applies to only locals. The ticket is valid for 2 hours in the same zone, ie. the fare of taking 380, around 40 mins to the city, also cover the transfer of Bus No. 32 at Jun's, getting off first stop after Way Road, ie turning after the second set of traffic lights, after McDonald's. Jun's home is only 2 min walk from the bus stop.
Besides No. 32 that runs along Mill Point Road all the way to Como, one can have another alternative of riding on bus No. 910 on Caning Highway though any side streets opposite to Jun's.
910 is more frequent, about every 20 min runs between Fremantle (zone 2) and the Perth Busport, right opposite to City Central on Wellington Street.
I've found buses are free in the city along St Georges Terrace where the Perth Concert Hall us located, fabulous lights at night.
One more thing on the bus system in Perth: the bus terminus at Elizabeth Quay is well linked with the Train Station.
The Victoria Bus Station (about five minutes from Jun's) the transfer point for most buses that go around Perth, literally bring you everywhere in Perth.
People in Perth, besides friendly in general, are very disciplined compared with most cities in the world.
I must come back.