Do It Yourself DJ

We are having an intimate wedding...30 people at most. Our venue holds max 48, so the ceremony and reception are in the same space. The DJ is $400. We did a sound test with our stereo from home and at one point it was loud enough to where we couldn't hear each other speak. Can I please get some pros or cons/experiences of people who just provided music for their wedding on their own? How was it? Did you regret not getting a DJ? Please help! LOL thank you!