I can only get 15 to 20k out of a set of tires for my car, (Performance tires combined with a hooligan at the wheel)
So for me motorcycle tires are going to be about the same price or cheaper for me. My car is also getting up there in miles and needs a crapload of maintenance in the near future, I can put this off for quite a while as I might drive my car 2 or 3 times a month now.
Just saying, even though most of us have the same motorcycle, so the expenses should be similar, our car expenses are going to vary greatly.