As you know USA is a big area. There are many opportunities for earning big money. I think that transportation is the best option. You can find more information about it in my other texts. Of course trucking companies are not only earning money. They also have to pay taxes. Fuel tax is the most important outcome for transportation firms in USA and Canada. It has to be paid on time and state forms have to be free from mistakes. It is controlled by IFTA. They will give you more information.