I have started four different businesses, become a minority shareholder in a 5th and written a book ALL with no money to put up. So based on my experiences, here are the top reasons you should boot strap your startup.
Most that start up a business around their passion would easily provide these services for free, and have probably often had to. You pick up a paint brush, a camera or use software simply out of interest. Soon to find out that people are willing to pay for your service.