Reply to Beginner Sound Setup

Haven't done any DJ'ing in awhile, and when I did I just used a basic setup of 1 powered behringer speaker with my vci100 and audio2dj soundcard.

Im supposed to DJ 2 weddings this year and I need to get a real setup finally. I am a complete noob when it comes to anything sound/speaker related. I would like to get 2 speakers and a sub if possible, I thought about just getting a powered sub to add with the powered speaker I have, but I have no clue how all this would hookup to a soundcard with only 2 ports, as the speaker takes up 1 and headphones take up another.

Any advice would be appreciated on if I need a new soundcard, or what I need to power 2 speakers and a sub. Like I said I have no clue about any of this and its driving me crazy trying to look up stuff.

Edit: So i guess I could just add another powered speaker? Can I hook 2 up to the 1 port on a soundcard though

Thanks