$48k is no more shocking than our neighbor who shelled out $75k for a Tesla. I guess he had plenty of money burning a hole in his pocket.
However, the cruise is for 1 week, the Tesla will last several years. Although that being said, I paid less for my most recent used car than I did on my DCL vacation.
In some places, I'm sure you can buy a house in the $48K - $75K range.
Mike
PS, I do agree with a PP who wrote that Tesla is an amazing car.