I completely believe that he was making 1$ a day at some point, he’s just neglected to talk about the 20 million he had in the bank from daddy.
Probably also ignoring his college dorm, tuition fees, and probably cafeteria fees.
There is no way you can “buy in bluk” when you have 1 dollar a day, as described in the article. You can barely get one orange per-day. Not to mention, there will be no way to reach a whole-sale store in the U.S., since you cannot afford any transportation, public or private, with 1 dollar.