Dave - Ive found that my 20' container doesn't get stifling hot. Part of it is probably because it is a very light grey, and it is shaded most of the time. In the summer it will get warmer than the out side temp, but not by much. But, then we usually don't have many days when it gets to even the mid-90s.
We built a new house about a dozen years ago. I don't remember the particulars, but I don't believe it was significantly different than fiberglass batt. Two guys with sprayers did the two story house, with finished basement, in less than a day. That included between the ceiling/floor joists.
