But this case is, that the guy is renting the car, and Tesla wants him to fix to their standards, and he's trying to pass of this fix, which you have to admit is questionably, and they didn't agree to it.
In this case, I'm not sure how right to repair would make any difference.
And when your motor is going to only last 30k miles, you can probably get away with a lot more, as opposed to a fix that is expected to last 200-300k.
If Tesla the manufacturer charges twenty times more for a repair, it's certainly reasonable to check other alternatives first.
If Tesla the leasor insists that repairs must be done by Tesla the manufacturer, then it seems only fair and equitable that the leasor pays the 1,900 % excess charge to the manufacturer. (It's not as if they'll be that much out of pocket anyway.)