I'm coming into the Tesla world from the Toyota/Lexus brand. Service wise, I've been pretty spoiled with my 2006 Prius that currently has 160K+ miles. I've only spent about on average $140/year on oil, filters(oil/air/cabin), and wipers at the dealership. At 100K miles, I replaced all the fluids(coolant, brakes, power steering, transmission) for about $250 (buddy helped me...I paid him for his efforts). I replaced the 12V battery twice at about $150 per battery and the HID bulbs and other lamps. The Prius has not had an overnight stay at dealership or shop..and I've always walked in for routine service. What type of maintenance and associated costs can I expect with the Model 3? Are there any user serviceable items on the car. Can I walk in to a shop for service or is it all by appointment?