Railroad Tycoon 2

[Evil Capitalist]

I've started playing this again recently, and I'm having problems with the second Australia scenario (penultimate one in campaign). I usually rely on steady routes based on large freight trains, but these are uneconomical in this particular scenario. I have about 12 years left to get to $1m profit per annum. I have enough shares to buy up the Sydney or Melbourne lines, if necessary. Any ideas?