Would like to be a courier So Cal to New England this spring

Our truck shop has had a number of vehicles delivered to it by one of the driver services that use casual drivers on a per trip basis. In every case, the driver paid all expenses for the trip, and was reimbursed on delivery plus the delivery charge. I understand some of the driver service companies will front the first tank of gas for a car, but I doubt they would do that for an RV.