The article discusses six side hustles that can be started without significant start-up costs. Shaun Ghavami, founder of 10XBNB, launched his short-term rental side hustle with no investment and now takes a 35 percent cut from the company. The company has generated over $5 million in booking fees since its founding in 2020. Social media consultant skills can help companies attract attention and increase engagement with customers. Copywriter skills can be a valuable investment due to their extensive knowledge of niche areas like digital marketing, SaaS/eCommerce, and health/lifestyle.