Starting a business and having a shares in a business both are good ideas but you know I will surely invest in share business when you start your own business along the way you might need some money to maintain it and when there's no money to maintain such a business the business might stop and might not be going well, but when you are in a share business with other people other people may have the money to maintain the business but when the profit is out maybe you can deduct from your own profit and return the money that they used to maintain the business in order to sustain the business and make the business move forward.