Must be another world there compared to the Midwest. Business license? Never heard of such a thing a least for a sole proprietorship.
Taxes? Unless you have employees you don't need workman's comp. Uncle Sugar is going to get upset if you have any significant income (i.e. $10,000 per year) that you didn't pay estimated on the second year. But you usually get a one-year pass on that.
It seems a bit extreme to incorporate. A little bit of liability may be in order, but that should be minimal with a large deductible. I can't envision a lawsuit for anything other than personal injury that could encompass more than a couple thousand damages. And the venue owner is really responsible unless you are super-negligent. In short, you are unlikely to lose your house.
If you carry disks, it would be a good idea to get some insurance to cover theft.
I would think you could continue to wing it. But of course IANAL and YMMV.