My neighbor who is an orthodontist makes a whole lot more than 200K. Unbelievably lucrative but yes, as others hav pointed out, unbelievably expensive to get there. Become a NYS resident and go to SUNY Buffalo. That is a well regarded program and would be very cost effective.
Just to add something others haven’t mentioned maybe you need to think of something else. Something in the middle. Your two choices are so far apart. Cleaning teeth as a career or a doctor. There is nothing you are interested in the middle between these two carriers that might be a little more intellectually stimulating in the long run, provide a strong income but take less time and money to get there?