I arrived at 1900 with little more than 50 millions and an annual income of around 3 millions.
I started by setting up cargo lines connecting some industries with more than one city (I now have three industries around 100 production near Pizzirrino, Poppiti and Ostiano) and they constitute the bulk of my income.
I then started to connect cities with busses and later replaced those lines with railways. I now have three lines with 3-4 cities each (Giglio-Barricella, Barricella-Ronzone, Pizzirrino-Poppiti) and will connect more cities later. I could have connected more if I run time slower. These lines generate an healty amount of profit (up to 500K each).
I also created 1-2 bus intra-city lines. They run at small losses, but they feed my train network well.
My most popolous cities are Pizzirrino and Tinnura with 450 people.