I am diving the motor home up to the States for a South American family stuck in Mexico. They are going south and the RV is going north to a consignment lot.
I use the sct site all the time when figuring budgets. I am just trying to have a accurate budget for them. I know that the toll costs are the costs and you pay to use.
BTW, There is a lot of new asphalt on the toll roads making them smoother than the free roads in most areas