>>>I don't know what kind of kms/year my daughter will have but I don't think it will be high (probably less than 10,000 miles per year). But she needs the car for work; not just for some times. If I suggested to her a car-sharing, she would not take it well :)
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>>from your OP: "Shopping for a car (helping one of my kids). "
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>>One way to read it would be you are helping by paying for it (and compared to that, car-sharing ***is*** a let-down) or it could mean you assist by adding technical hints or add as a distraction while haggling with the dealer (and in this context, reminding her of car sharing options IMO is closer to due diligence).
>>My solution is to always offer #2 if asked, but in situations closer to #1 to always include the helped one in the financial part as well - at least 25% of cost. This way I am certain that value/price/effort considerations are learned, as early as possible...
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>No, I am not paying or contributing in any financial way to the car my daughter was looking for; and decided to lease. Financially she is very independent and can afford the car and other things she needs. But since it was her first car I was just helping in "dealing" with car sales people (especially now after this experience I have even less respect for them). "Offering" my daughter the car sharing option (as much as it could be good for some people) would not be a due diligence but rather foolish (on my part).

Gratulations either for having a smart kid earning more than usual right at time of gaining driving license or one that did not need a car since that day up to now ;-)