My Dad and I spent the better part of a day installing windows. All but two openings have been filled. One of the remaining is for a slider door, and the other had a broken frame when I received it. Both of those will be installed in the next few weeks. It'll be really nice to be all sealed up for the winter.
It was truly nerve wrecking to cut an opening in the aluminum. It wasn't all that difficult, but there was no turning back once the process was started.
Here's a little contrast. As you can see, the trailer is parked about 2.5 feet from my home. I can stand in the trailer and smell dinner on a good day. On a bad day I can stand in the trailer and hear my kiddos getting out of line.