We have a 2017 MS 75D and installed a NEMA 14-50 outlet in our garage and bought Tesla's corded mobile connector that we keep attached to the outlet all the time and keep the one that comes with our car in the car. We use Tesla's cable organizer to hold the hose and the charging handle. We're fine charging overnight, even set it lower than we need to for a slower charge. We liked the more minimal look of the outlet with plug (1-1/2 inches deep) over a mounted wall charger as our garage is a bit narrow with everything in it and a little bit easier to walk past. The lit portion of the mobile connector is 2 inches deep so pretty low profile against the wall. And we're not likely to hit our head or shoulder into it if we need to squeeze past it.
If your electrician has already given you your options for each and they are about the same cost, it's kind of a toss up. Even with the wall charger can you set it for a slower rate of charge, but it would allow you to increase the rate above what a 14-50 would give you at max allowable. Placement is a consideration, inside or outside. If outside do you care how visible it is and accessible to anyone. We installed our 14-50 indoor garage outlet close enough to our driveway that when we lower our garage door (we add two pieces of wood blocks on each side of the cable to make sure the cable isn't crimped), and we can charge indoors or outdoors which is nice if company would need a charge in the driveway. Plus we don't have to worry about the weather or keeping the electricty locked up.
Congrats on the new car!