I think putting things off will hurt us in the long run. I think the benefits of decreasing our oil use, creating jobs for the rail system of this size, and cutting emmisions is something to invest in.
We are already decades behind europe and asia in regards to transit, why should we put it off any longer?
Remember, to make money, you have to spend money. Have you seen an increase in taxes lately? I havent. Or is it moving money and spending it on other projects?