I read the mishpacha article some write the wedding night cost some include furniture cost some only write their share and some the full cost so its not comparable
regarding the Tesla I'm craving for one sorry if I hurt your feelings
regarding how much should be spent, if you have money and you can afford to spent 100K on a wedding go for it if it makes you happy, (and you give enough tzadaka) everyone has soft spots that they enjoy and we shouldn't judge were they should spend it, some go to Antarctica and some enjoy spending it on family