Service cost is running you ~42 cents/mile in year one. But I concur that the tires and brakes are not annual service items, my last set of Michelin summer tires lasted 35k of...uhh...right foot generous miles and that was in a 3300 pound station wagon. The all season Michelin Defenders we put on the 2200 pound hatchback last four winters and 40k miles and really went down due to rot from the shitty salt.
Brake pads vary, based on your braking habits, but the Porterfield R4S pads I use on my cars are usually good for about 20-25k miles.
So, you could probably average your tire and brake budget across 2-3 years in your projections.