They have a scarce amount of money; and lack room to travel with all their possessions. They must what they have left to take care of "travel needs" (e.g. food and gas—(travel supplies)—to move west.
You could maybe at a point where Bella and Alejandro meet before she knows it’s him. It’ll make it more of a surprise if she already knows who it is, and was unsuspecting when she first met him.
