But we don't really need that much transportation to the airport, compared to other routes.

Hell, the airport is in the process of being downsized.

I think fixing some of the inner city transit issues would provide a lot more bang for the buck.

Electrifying the busway for example would be much cheaper and provide those long term cost savings.

Hell, our current It's rolling stock is well beyond it's original expected life. I bet that's higher on the list for light rail spending.