Just like my subject says...does anyone think that a person could make a living making customized hot dog carts? I mean you can't really ship them long distances so a person might be limited to certain geographical areas....but it's an interesting thought.....
One of your problems is you're located away from the geographical center of the USA and major markets.
50% of your market radius is in the Pacific Ocean!!!
You would need to do EXTENSIVE research to Identify the Competition and determine the size of the potential cart buying population.
The only way to overcome those limitations is to build a VASTLY Superior cart at a reasonable price and market it effectivly. And all that takes $$$$$$$$$$!!!
Company startups are HELL!