You might be disappointed if there is no loan from banks.
However, think about living WITHOUT paying any interest AT ALL, like the above volpunter.
To do that without any loan including credit card (temporary loan for a month WITHOUT interest), you have to keep some cash in your brokerage account for living expense.
I admit very few lives like that in the world. My estimate is no more than 10%, mostly for higher class who seeks ultimate economical living theoretically.
Of course, for the case of emergency like medical reason, you have to keep good FICO for future loan. Usually no more than three times for any possible loan in his/her entire life.
For example, instead of loan for car, you have to save every month for five years. After five years from now, you can change a car with ALL CASH.
Furthermore that is more economical than paying interest for the next five years.
You make(save) exactly same amount of money that creditors like BAC makes for the loan, based on the zero-sum principle,