When you run a small business you can have wildly fluctuating personal income, especially when you first start. Before you launch or if you are having difficulty in a cyclical pattern then it’s worth a look at this Lifehacker synopsis on how to manage your personal finances. They summarize nicely the article from Learnvest.
If you look at these areas and share it with your family they are more supportive of you and your business. No one likes surprises especially when it’s negative. So share from the start and it will help to keep you a bit more financially healthy and your family relationships will be better.