Feel like a truck driver of a dump truck, buy, load various ore and transport it to the station, sell at inflated prices.
To deliver the goods, go to a more powerful and roomy truck. Note that on each map, ore has a different price and weight:
improve the engine so that the truck can accelerate faster and climb steep slopes
upgrade the gearbox to make the truck faster
improve depreciation so the truck can carry heavy loads
improve tires so that the wheels do not slip
Increase the volume of the gas tank so that there is enough fuel for long distances, consider the more powerful the engine, the more it consumes fuel