I'd throw the keys of the Neon to a charity if you can find one, or the mechanic. Its not worth anything at this point. Then have your friend rent a car to continue the drive, when they get out to where they will be living they can buy a car.

Or they can go into the nearist whatever dealer and buy a new car, I know people who have done that.

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1999 SL500
1969 280SE
2023 Ram 1500
2007 Tiara 3200