No problem with people bringing stuff to sell or show off, but I wouldn't really want them to expect a profit. I'd hate for someone to haul their butt whereever, sell $100 of stuff (for $10 profit) and head home bitter. How many attendees would we expect?
Vegas is OK. Reno would be better - easier to navigate around, fewer distractions. I would prefer some national forest over either, though. Sit around, hack stuff up, sling the bull. Ideally, we'd find a place with an airport, hotels, and nearby open space for those interested in staying/convening outside. I'm wracking my brain, but can't get more than two of the three yet.