Also take note of the weather conditions where you are for planning the timeline of your window creation/placement.
In Australia I leave my windows to the very last minute I can possibly manage without delaying the build too much (i.e. I create as much of the decorative surrounds as possible before I begin constructing the house rather than constructing and then decorating). This is because gelatin windows curl and pop out of their icing frames in the hot/humidity of summer and poured sugar or isomalt windows will sag and run in warm weather
I learned this the hard way the first year I made windows and ended up having to place a pair of cricketing kids in the yard to explain the holes in the windows!
..... And then pipe a vine trailing down the wall to hide the run of sugar!
