I think your final estimates are off a bit. If all the ice melted on the planet, the sea would only rise a little more than 200 feet. Check out the animation:
http://www.techinsider.io/changes-to-the-earth-if-all-the-ice-melted-2016-2#ooid=5xam5iczrSx4Ibx8MvarDsu3zOG88omE
RE: Sea level Rise . Projected Sea levels Rising , Using simulation scenarios to project rise change impacts on earth coastlines