http://www.openculture.com/2018/03/how-much-money-do-you-need-to-be-happy-a-new-study-gives-us-some-exact-figures.html

Hypothetical windfalls aside, the question of how much is enough is an urgent one for many people: as in, how much to feed a family, supply life’s necessities, purchase just enough leisure for some small degree of personal fulfilment?