In my years here, I've seen people justify some financially downright STUPID decisions with the "but...MEMORIES" excuse. If you can afford it, and it fits your style, you don't need to justify anything to anyone - go for it. Even if its not nearly as much fun as my idle cash - which is not idle - its an investment in being able to travel around Europe as my husband and I back off on our careers.
I don't think we see things much differently other than my point about idle cash.
I'm comparing having cash that is truly idle and using part of it to purchase into DVC. Your idle cash is earmarked for traveling around Europe which is not the same thing, although I would agree that it is a fun way to spend money.
