Retirement for business owners comes with some unique challenges. First, you will need a way for you to provide for yourself and your family once the sale is complete. A financial planner can help you with this, but there are things they just are not equipped to deal with and that is the emotional retirement.
Business owners are a unique bunch. They tend to be more focused and engaged in what they do and disengaging can be difficult. It is very important to have something to do that will give meaning and purpose in your life in retirement. Otherwise, depression might follow.
Many of the social connections you used to have, are other business people. You might find that they are too busy to talk to you, so you need to make new connections. This is also very important. Some have been known to fall into isolation without these connections.