Just curious here but what did they do that was so negligent, if we know what happened we may be able to give better advice. 

It won't cover negligence.

Good faith usually works if they were at fault but not through negligence, i.e. through honest ignorance, splitting it 50/50.

The difference that 1% makes is negligible IMHO.....

Just because you have a waiver does not stop you from getting sued, especially if the client thought there was negligence

If it continues to be an issue in the future, you have made your expectations clear and can take legal recourse as the homeowner.They sound like young people, so they're likely not doing this to be negligent.

In general, yes this is true with the caveat that the right used car - one priced at a point where the initial depreciation hit has been absorbed by someone else but the concurrent miles used are negligible - will be cheaper, everything else being equal.

Most would say the PM made the mistake so they pay, but I have read MANY PM contracts and more than 1/2 of them are written so the PM could be negligent (like this) and you have no recourse.

You're never going to be able to argue effectively that the tenant did it through negligent behavior.

It tells us that people who live there take care of the properties and are not negligent or abusive of it.