I would check with your town zoning office before you do anything. I was told one thing by my little town and then had the rug pulled out from under me. They went and passed an ordinance while I was jumping through all of the hoops needed to sell hot dogs, no food vendors allowed.
As far as $200 a day, like was said, if you have a good spot, sure, 5 or 6 weeks or more to build it up. It took me around 8 weeks in my current spot to see any good numbers. Had allot of $100 days and then around that 8th week, all hell broke loose, and we were on the map. It was 8 weeks of second guessing and kicking myself for getting into this racket. Now, I cannot wait to get back out there, this should be one hell of a year.