A new car is what, $25-50K? Thats a one time cost.

How much do you think youd need to pay a maid every year to do your cooking, cleaning, laundry, dirty dishes etc? Coming once a day for 2 hours would be very expensive and still wouldnt be comparable to a robot that you own and is constantly deployed.

And at that point you’re probably comparing owning a robot to renting one.

Most people buying a new car don't pay them in one payment, they either lease or credit.

A car has a number of periodic maintenance to do + in most country some tax and some yearly technical inspection.

This is non counting the energy required by that car, electricity or gasoline