Motors are usually not a wear item, control units also don't usually wear out assuming you buy the car from a reputable company.Don’t forget about these,
AC charging electrics £2000 a piece some cars have 2.
Front drive motor electrics £2000
Rear drive motor electrics £2000
Motors run at £3000 each
Multiple other control units, charging connectors and cabling.
All prices are base parts only not a fitted price.
I had a Q5e come in a few weeks ago. Warning light on dash. A rodent of some sort had chewed through the high voltage cable shielding along with some of the engine wiring. Car was taken by the insurance company due to repair cost. Can only assume it was taken for repair somewhere with a lower labour rate however If it was my car I would be worried about the repair quality.
Same for gas engine, if you buy a complicated delicate car then anything even ECU can fail, but that's not the norm if you buy it from a reputable company.