Now you can work as a trucker and in gta-united you need to overtake without time a tractor with a trailer from the airport, it is located on the right on the island, a large airport there will be a dollar icon on the map and you need to overtake to the place where you appeared at the beginning of the game and there is a ferry crossing, if you look at the map and a little higher from the ferry on the map there is a pier and there will also be a dollar icon and there is a sphere next to the ship on the pier under a large crane and you need to drive a truck with a trailer there and you will earn a lot of money, the road is difficult but without time and damage, but just what could be delivered with a trailer and you need to drive up to the marker with a car on the marker, then the mission will end, you can overtake as much as you like and look for trailers in other places, you can also tractors.