A handful of small business owners from different sectors and from about Massachusetts arrived with each other Thursday to call awareness to how the proposed surtax on cash flow more than $1 million would impact them and to press back again towards the notion of the proposal is anything that would impact only the super-wealthy. “The way this tax is portrayed in the media, it’s like all these prosperous men and women with boats and million-dollar homes and are just owning gobs and gobs of cash to throw all around. But tiny enterprises are not like that,” Ann Sullivan, who owns Metro Machines Corporation in Braintree, explained. “This is our…