Pushed a commit for pakset revision up to 1850.
The future trains will cost considerably more to run than currently. This is because trains are excessively profitable at the moment, with just 5 passenger lines of my company on the server generating more profit than all other companies combined. They will still be cheap enough to make good profit from, but no longer as good as free.
For how the numbers were derived...
Due to a lack of overhaul/maintenance feature, I have factored in the cost of the trains into their monthly and running costs. Every ~1,600,000km one will effectively buy the train again. Every 1200months (100 years) one will also effectively buy the train again.
Fuel economics is currently at 0.01 per kW per km. Trains have an efficiency divisor of 0.5, with tanks 0.6 and inefficient trains 0.4. I am aware this probably is kind of nonsense, however without an actual fuel efficiency model it is likely good enough.
Each person is paid 10 per month. With trains using either 3, 5 or 7 people at the moment depending on size and power. Obviously this would be replaced by an employment system eventually.
So a 80kw train will now cost ~1-2 per km and ~70 per month. Before they had numbers like 0.2 per km and 6 per month.