Hello all and d shepherd. I have studied a lot about building barn houses and I am 3/4 done with mine. I spent a little more money on my barn than a normal pole barn. My wife doesn't like rain storms so I purchased a steel truss barn and made it into a house. I purchased a Miracle Truss building. It comes with stamped plans, however I had to get foundation plans drawin up locally. It was easy for me to meet codes here. I understand some areas are more strict.
You can gain a lot more space by get 12 -16 eves hights. This lets you put in a second floor. Your possibilies are endless. Check them out. http://www.miracletruss.com/welcome.html