Final answer:
Steve Madden used a rented trailer in 1982 during Market Week in New York to start his now-famous shoe business, alongside creating an attention-grabbing documentary.
Step-by-step explanation:
The individual who used a rented trailer in 1982 to start his business by selling outside of Market Week in New York and creating a documentary while doing this is Steve Madden. Steve Madden's unique approach to selling shoes from the back of a trailer during Market Week in New York City showcased his entrepreneurial spirit and marked the beginning of what would become a highly successful shoe brand. His strategy included reaching out directly to customers and utilizing a gritty, documentary-style advertisement to stand out in a crowded market.