Ask HN: Have you done a lifestyle cost calculation? If so, what's your method?

I'm moving into a period in my life where my goals for lifestyle, money & longevity are beginning to coalesce, and as a result I'm focusing strongly on understanding what lifestyle I want for the next (hopefully) few decades. Is this something you've worked out yourself, and if so, what are the factors you've taken into account & how have they affected your lifestyle / careers choices moving forward? Did you drop something you thought you needed & found it greatly improved your well-being / happiness?