There are many a businesses started without any investment or special funding. Here are some started small incidentally but now are big businesses of today.
Lynda Wieman went to market to get graphic designer books for learning, but all the books were less then the knowledge what lynda already know. So she wrote his own book to teach people about graphic designing. soon he think of online and bought a domain name lynda .com for just $35 and after launch soon it gone viral. Later she sold lynda .com to LinkedIn for $1.5 Billion now lynda is linkedin learning.