Allen, Like Jeff mentioned those ratings are under load. Also, if you turned all of them on at the same time they would probably throw the breaker as the startup surge usually comes close to the tool's rating.
Good suggestion to run more than one wire and sounds like you could use them. More than likely though it will be a per curcuit charge, just depends on the company/person your working with.
To a small child, the perfect granddad is unafraid of big dogs and fierce storms but absolutely terrified of the word “boo.” – Robert Brault