I really think the biggest mistake in getting married is holding an elaborate wedding, going into debt, buying rings, dresses, tuxedos, catering.
Its all style no substance.
Do it on the cheap, preferably with as few people present as possible. It should be about the two individuals in the marriage, two witnesses, and the commitment. Everything else is fluff.
Marriage is so much about priorities, in my view. Do you prioritize the daily grind, the keeping up with the Joneses' mindset, or do you prioritize the relationship and maintaining it against (most) odds. Obviously there are untenable situations. People with extreme mental health, drug addiction, and violence and cheating issues/seuxality issues, for example.
But like, most marriages that end in divorce did so over money. Obviously if your partner is just blowing through credit card debt, that's an issue as well. Its a case by case basis thing, but just not having much except one another and your commitment and your children, to me, should be something a healthy relationship can overcome. "We don't have much but at least we have each other" mindset.
Not directing this at literally anyone or necessarily anything stated in this thread. Just a general feeling I have on the subject.
End of the day, the reason my relationship has worked is because we met young, learned to rely on each other heavily, give each other an enormous amount of support emotionally and listen to one another and actually care about what the each other's issues and feelings are. Probably wouldn't have worked as well if my wife didn't have the background she had when we met (single mom alcoholic poverty family history). She's content and happy with what she has, and so am I.