Cable cars are not exactly the "cheapest" tourist attraction to build. It would take years to complete. Besides where would they put it? And, they would need huge towers to carry the wires - with land already do scarce in this area. Yeah...not sure this would happen.
Not sure about a cable car... perhaps up near Kalamunda/Gooseberry Hill? There was talk, and still is, of resurrecting trams in Perth - I can't believe they were ever stopped from running here - what a wonderful idea - a tram to the beach...
I think it is a great idea forgetting the cost!
It could somehow go over Kings park which would be a fabulous drawcard for Perth.
Was it the Premier I think I heard talking about this idea the other day and I say, go for it!
Where they will get the money from is another question.