I may be a fully employed professional computer geek, but there are some methods of quick money that I respect:
- Prevalent on Vegas pedestrian skybridges, Water bottles from a cooler (especially on a hot day) are also effective outside of sporting events. The margins on this are pretty good because you can get a 24-pack of water bottles at Costco for about 7 bucks, and sell each bottle for a just a buck and you'll be severely undercutting the stadium prices. (Qwest Field used to allow sealed bottles of water into Sounders games.)
- Who can resist homemade ethnic specialties, like tamales from a food truck? If it were me selling, I'd be peddling snickerdoodles and peanut blossoms.