I also live out in "the sticks" and had a local electrician do my installation. At the same time, I had him install a 14-50 outlet, and a welder outlet right below my HPWC. He installed a small sub-panel box with circuit breakers as a service disconnect and so I could keep the power off to those two wall outlets. I have one grandchild already and probably will have more, and sure don't want curious kits poking something into a live 240 volt outlet! Those additional outlets added almost nothing to the overall cost, and provided me with a backup changing option in case my HPWC fails (I have heard a few stories.)
Since I already had 240 V, 60 A service to my detached garage, I just had to have heavy wire run across 3 bays to the far side where the Tesla resides. My HPWC is located near the garage door so if I wanted to plug share or charge while parked outside, the cord from the HPWC would reach. I have 50 A to the Tesla side, and since I only have one charger in my car, I can only charge at 40 A anyway. That gives me 30 miles / hour charge according to my display, so I guess I have a fully rated electrical supply at my residence.
I personally believe that some people get "special" treatment, which isn't always a good thing. I'm sure the Tesla electrician knows you've got a Tesla, and maybe adjusts his fees accordingly. I never tell any contractors what I do for a living, otherwise I'm quite certain I would get the special "doctor discount." In fact, if you want to test out my theory, ask your local electrician to install a 50 A welder outlet where you want your HPWC, with a 14-50, and see what that would cost. Then ask how much extra for an electric car charger at the same location.
Welder outlet -- regular guy.
Tesla charger -- rich guy.
Call me cynical. I've been called worse.