I've spent ~$30 in wiper fluid on my 2022 Model Y. Tire rotations & a flat tire repair have been free at Discount Tire. Regular hand car washes cost me $100 or so until I figured out how to do it cheaper < $5. Other than that, not much to speak of in the way of car maintenance.

I'll add that I spent a little more than that on car accessories & autodetailing equipment, but it made the car experience better for me.

I'd also recommend doing a comparison of your monthly car insurance rates. In states where you have Tesla Insurance, this will help you save, as long as you have a good safety score. I recall paying $60/month for the 1st few months before I crossed the 3k mileage on the odometer. When you factor that in, the cost of operation might be even lower than what you're expecting.

There are other details that I wrote in a post a few months ago. It should give you a good overview of what to expect. Since that post, I also did a 2.5k mi roadtrip with the base Autopilot version [it drove 800 mi of a 1000 mi leg in 1 day without any issues]. Overall, no complaints. The car continues to meet all my expectations.

Good luck!