Can you help me to identify and explain any industry and market issues when I want to start my own minivan business?
Your question is very broad, as if you are asking people to provide you a full business model or proposal to help you run your business. You first need to provide some useful details here to make the conversation useful like which country/state/city are you in? How much capital do you have? Do you already have experience selling minivan? New or used minivans? Selling or renting them? ...etc
Anyway, the bottom line is as long as 'you are good in selling' and you know where to find your customers then you have no problem doing most of the business.