I mentioned vending business before. It is one of the simplest, and, at the same time, profitable businesses, but at same time it is very easy to operate it, even a child could do that, if you will offer him a candy after that. Many businessmen have understood it, and actively use this technology. But machine with coffee, tea and water are everywhere now, so it will be hard to get in to the market. Because of that, you need something that is not so popular, yet. That new type of machine guns (especially, it concerns regions) is the automatic machine for popcorn sale. Popcorn is very popular in US. Especially it is loved by children. And businessmen who already use this type of vending machines.
To establish similar machines near cinemas, universities, schools, etc. I am sure that the similar technology will bring very big success.