Beater only make sense if you had it since a long time ago and retire it but not wanting to sell it, and it is unique because of sentimental value or if you need it as a special purpose vehicle (towing, hauling large item that won't fit, track car, moving trash and other smelly stuff around).
If you have 2 perfectly functional newish vehicles, buying a beater to save miles on the newer nicer cars rarely make senses.
If you have 2 perfectly functional newish vehicles, buying a beater to save miles on the newer nicer cars rarely make senses.