Business Owners - What did you build?

[Sam White]

Interested to discuss what types of business owners are out there in the BP community.  I know there are multiple threads that already discuss it, but lets bring in some updates!  

Any non real estate related business owners out there?  What industry are you in?  How did you build it?  And what advice would you give your 25 year old self?

Real estate based business owners, how do you differentiate your model from other wholesalers, flippers, agents, brokers, etc?