HGTV host Matt Blashaw thinks the chief appeal of a vacation home is its convenience. "It's an easy vacation," he explains. "The point is just to go have everything set up the way you want. You know the area, and you know you're going to have fun." The vacation may be easy, but the second mortgage probably isn't. For that reason, Blashaw helps families on his show, "Vacation House For Free," renovate under-the-weather ...