I was in the DJ and Sound business for around 20 years as well as doing other things. It wasn't my full time gig, but I did make more than beer money. My ex partner is still in it although it's pretty much evolved into a Home Theater business now. It's a good business and you can do a lot. The more lucrative gig is to get in with several hotel's and provide rental service. Big Bucks! The only other advice is to make sure you get your money up front if you're doing a band or DJ event. Many bad payers in that area.

Hey man, when you get ready to start your business, I will hook you up with some cheap cards and vinyl for your van. Let me know. :D

Thats my problem, I always feel like I'm behind and not doing enough. I always think I should be in one more deal, or making a bit more, or spending a bit less.

Pacing is something I'm working on.

From what I gather, you’re probably doing better than most 24 year old self employed students are doing these days.

At some point in every deal, making more and/or spending less comes with greater risks.
It’s normal to: “Want it all and want it now.” But then, look where that got Veruca Salt.

By pacing yourself as you get going in any business you can safely build the capital to do the “bigger” things you want to do down the road. Also - With said capital, you can more safely take the greater risks. Think of it as a safety net.

Pacing yourself and succeeding (on any level), as to jumping in too deep and failing, is also what will help you build good rapport with the financers. And, you will certainly need them on your side.