Have you or anyone you know built a house?

My friends are planning on building a house and after months of looking at lots, they FINALLY agreed on one. Now all they have to do is find a house plan they can agree on. Sounds simple, right? Not so much! Last night my friend called me in tears because she got into an big argument about a staircase with her husband. Apparently, the argument got so heated that her husband had stormed out and she was left with tore up house plans.

I felt bad for my friend and I wondered how a staircase could cause so much trouble. I have heard that one of the hardest things to do is to build a house with someone but I had no idea it would cause the big D word to come up.  

What do you think? Have you heard of people getting divorced while trying to build a house together?