Keep the Roadside Shop Filled
Advertise your shop well
The orders that come in from boats and trucks will pay you different amounts of money. Though you can get more money from selling in your roadshop farm, if you are still trying to play the game, focusing on orders that do pay more than others can make a big difference! If any of the orders are quite low in pay, you can ‘trash’ them and wait a few minutes for a new one.