Knowing how you want to exit your company and when will allow you to build it successfully and get out at a high value rather than when you are bailing out. Exiting includes selling to an outsider, an investor, a partner, an employee or a family member. It could also mean not completely leaving but just selling, or giving up, enough interest to relinquish day-to-day control while still maintaining an income.
Without planning for these things, you can’t possibly build the value you need to get the money you desire or have the correct structure set up to allow you to sell the business or even give it to a family member. Don’t forget, almost every small business is very dependent on its founders. That makes a company very difficult to sell if the founders want to eventually have nothing to do with the company after the sale.