Service business can be grueling and your projects can quickly turn into nightmares if not planned well. The small businesses who want the websites from us can be very vague in what they want, and might not appreciate some of the great stuff that we do (like getting the Pagespeed score above 90) while appreciating lame stuff like those landing page flash intros.
In the initial phase (first 3 months) take more well defined tasks that can have less margins, but can help you appreciate the hardships in the business. As you mature, you can take up more complex projects that can give pretty fat margins.