Elon keeps hoping that side mirrors can be eliminated eventually. Cameras is what he wants to use, the rear view mirror on the truck uses a camera
This was a unveiling, so things like what you mention will be added. As for the final version, it won't change that much in design. If anything, it will be minor.
I have a 50amp solely for charging the Tesla. I had my neighbor install it (he's an electrician) so the price was cheap...a bottle of bourbon
I bought all the items needed, so that cost roughly $130 (the wiring was the most expensive part, $100 for it)
We went on exterior of house to make it quicker to install