When considering a non-essential luxury purchase, the 'rule of five' suggests that one can only afford an item if they have enough cash saved to buy five of them. For a $10,000 Rolex, this means having $50,000 in savings.
"the way that I did it for myself is I follow the rule of five which is if I can't buy five of them I can't afford one of them especially in this phase now that's tough if I want to buy a $10,000 Rolex that means I got to have at least $50,000 put aside in cash before I can go out and afford that $10,000 Rolex"