I live in Michigan, where Tesla is basically illegal. Closest SC is in Cleveland, so like 3 hours. When my door handle broke 2 weeks into ownership, they sent a ranger to fix it while I was at work. While fixing the handle, the window got screwed up so they had to come to my house to fix that. Pretty painless overall, only caveat is that you usually have to wait a few days for repair.
As far as cost, since it was a warranty repair, they didn't charge that distance fee. Maybe they do as a "laziness tax" if you're close enough that you should go to the SC?