These things WILL need their batteries and motors replaced, and replacements aren't cheap.

The following links are Tesla related, but give an idea of what it costs to replace major drivetrain components:
https://www.currentautomotive.com/how-much-does-a-tesla-model-3-battery-replacement-cost/
https://www.greencarreports.com/news/1093713_tesla-model-s-drive-unit-replacements-how-big-a-problem