I don't believe the mobile part of your strategy would work well, I feel "semi-mobile" or perhaps "nomadic" is a better term to use for what I think works well. Last year I had very little luck going to single day events, but had huge success for multi day events. This year my products are more well known in my area and I just tried another one day venue and it was a hit. I was still stationary for the day, and I did set up an outdoor shop under my RV's awning. It did not have a very mobile Ice Cream truck feel to it in any way. I made most of the money before 1pm and by 3pm it was quiet but I had made over $500 (with product out the door) and gained a new "club" contract for year end awards. I also earned about $100 in "orders". It was a great revenue day. I had my doubts. So, perhaps as word gets out about your brand, a more truly mobile model could work. I also did NOT have power in this location, thus could not make anything for people. It made people dig deeper and search harder to find something to buy off my shelves. It was very interesting.