I’m thinking of buying my sister’s 2016 Model X which has 50k miles with batteries replaced last year, which seems to be a bonus. I’m looking in to see if she can buy an extended warranty that can transfer but worry about what it WON’T cover. I’m trying to figure out what might go wrong and how much it will cost to fix it. When I see comments like “eye watering” repair cost, I hesitate even though she will sell it to me for trade-in value. The cost of tires and having to replace them often seems to come up a lot, too. Any advice on possible costly repairs or routine maintenance costs? Any issues with getting things covered under warranty?