A large table saw just isn't a feasible fit in most small shops. But you should be able to get away with at least a portable table saw. Never mind veteran woodworkers who might look down on these compact tools–they're well-suited for many of the smaller ripping and crosscutting operations you'll need to perform. Some of the more compact table saws, such as this 10-inch Skilsaw, are small enough to be stored in a closet or under a table.
YouTube: I love this place! You can find video training's on just about everything! It can  help you with a lot of the tasks that you need to accomplish for your goal. So if you want to "sell products using Instagram" and one of the tasks is: post beautiful photos with text on my feed often, then you probably need to go on YouTube and search for "how to design an Instagram post, if you don't know the first thing about it. You can use YouTube to help you accomplish goals or tasks on your list that is out of your skill set. 
I think the music comment was about speakers for playing music. I put a few 8″ in ceiling speakers in from MonoPrice.com ($60 / pair I think) and love them. A space that big would probably need at least 3 pairs. You’re not throwing a rock concert with them, but they provide very decent background music for not much cash. The speaker wire from MonoPrice is dirt cheap too. Just add a cheap receiver to drive them. Of course, you probably don’t want to spend that cash at the moment. But it’s a good starting point for the future.
The refrigeration setup in your van is an area where you really do get what you pay for, whether you’re paying in money or in time. The best options are the most expensive. The cheapest options are a pain and/or don’t work very well. And if you try to save money with a DIY refrigerator setup, you could end up spending a lot of time on installation.

Ultimate Small Shop