I don't know if it was actually the most efficient strategy, but the thing I always liked to do in Transport Tycoon was find a coal mine etc in one corner of th

I don't know if it was actually the most efficient strategy, but the thing I always liked to do in Transport Tycoon was find a coal mine etc in one corner of the map and a power station etc in the other one and build a line delivering between them - you got paid by the mile so when the train finally arrived the fee would be massive. Didn't realise that was actually an accurate (modulo apocryphal) element of the simulation :)