my local dealership charges $200 for this service. Luckily I didn't have to pay for the first service since the dealership we bought it from promised all due services were completed when we bought the car (which I called them out on, and made them honor), and I planned on researching an appropriate DIY procedure before the next one is due in 4 or so years. I really want a Tesla, and I want to support Musk and reward him with my money so hopefully this truly innovative company can thrive, but it won't be at the expense of not being able to perform my own basic services.
hell, according to the manual, you can't even crack loose the coolant reservoir without losing warranty coverage.
I hope owners like you and I will be enough to change this culture, or like you said, I just might have to get a different car.