Share 'Is there a demand for personal cannons?'

Well like I was saying before, I am thinking about making them and selling them. But I don't know how in demand they actually are? It will take some financal investment on my part, both with materials, permits,and booths at events which I have never done before. I don't know whats involved with that either. So before I start gathering materials and such,I am taking a pole............What do you...