Mechanical Turk is Amazon's take on micro-jobs. These are small miniscule-jobs that you can do for other people, which they call HITs, or Human Intelligence Tasks. These are super simple tasks that anyone can do. Some examples are listing off some URLs with certain kinds of images for one cent, or recording a few phrases with a microphone for 6 cents.
Considering that you have a finite amount of time, passive income should make up a large part of your work. If you're serious about generating any semblance of income online, then passive income should be one of your sole goals and ambitions. Why? Wouldn't you prefer to do the work one time and get paid repeatedly as opposed to relying on your time to generate that income? Invest the time at the front-end so that you can reap the benefits on the back-end. This means putting in a bit of sweat equity and not getting paid today. Rather, you'll get paid somewhere down the road. And you'll continue getting paid whether you keep building that passive income stream or you stop.
Accommodate Multiple Forms of Payment: Many deal-seekers carry cash, but you want to accommodate every potential buyer. So, in the days leading up to the event, consider purchasing a point-of-sale system that can accept credit cards. Square is a popular and relatively cost-effective option: it doesn’t cost anything upfront and bundles credit card processing fees into its own per-transaction fees, resulting in a net expense of 2.75% for most transactions (net of $97.25 for every $100 charged). This is a small price to pay to capture the ever-growing cashless consumer demographic. On the day before the sale, visit the bank and grab $100 in small bills and coin rolls to ensure you’ll have enough change for buyers who do prefer cash.
As someone who's been immersed in a number of online industries for quite some time, I know a thing or two about what it takes to succeed in this arena. However, just like you, I started at ground zero with little knowledge, but a great deal of passion. What I learned along the way were some invaluable lessons from failure that hurt at the time, but helped immensely in the grand scheme of things.