Too often, working weekends, living out of a suitcase, and bringing the BlackBerry to dinner are the price one pays for being an entrepreneur. But try explaining that to a 6-year-old. "The other day my daughter, Luna, asked why I was sending an e-mail," says Shep Sepaniak, managing partner of Fritz-McDonald, a New York employee benefit brokerage with six employees and $20 million in gross revenue.