DC when they pull the first one let them know you plan on a second line and have them pull a drag line for the second line. that should be a no cost change. You don't want to cut up the drywall a second time. When they do the second line they just tie to the drag line and pull it.
anyone if you have a 200 amp panel in your house the difference between the 50A plug or the 60A wall charger should not be a factor. Smaller service yes it would need to be considered. Here locally all new house are required to have 200A service. the larger homes have 400A. Way over kill to do anything you want.
Good idea, will ask him for the 'drag line'