No, I simply added 2 Large Cubes, scaled them, Alt+H to hollow the block, a 3rd small one and CSG subtract (which is not that bad) to cut a door and added 2 columns.

That slider is pretty important, and most importantly it should never say "off". I keep it at 16 to 32 all the time, you may want to keep it between 4 and 16, depending on your preferences.