all of that stuff is just a matter of time though. Sure you can try to buy every item in a FF game and that will take a long time but it's not budgeting it's just time wasting. I think he means like RE1 where if you don't conserve your items you die, and resources aren't infinite where you can just keep going back and collecting more until you get something.
currently playing: Skyward Sword, Mario Sunshine, Xenoblade Chronicles X