balloons to lift a house

So, analysis of the movie Up is pretty popular in the blogosphere. Figure I might as well surf the popularity wave. So, I have a couple more questions. The most important thing to estimate is the mass of the house. I am going to completely ignore the buoyancy of the house. I figure this will be insignificant next to the buoyancy needed. Anyway, let me go ahead and recap what has already been done on this in the blogosphere. Wired Science - How Pixar's Up House Could Really Fly - from that post: First, they calculated (seemingly correct) that the buoyancy of helium is 0.067 pounds per…