"I simply do not have the time or patience for a larger house.”

"Still, my main reason for living in such a little home is nothing so grandiose as saving the world, nor so pragmatic as saving money. Truth be told, I simply do not have the time or patience for a larger house.” - Jay Shafer

Can't put it better. Here's Jays website, check out 'The Small House Book'.
You can also get it on PDF, Kindle, etc.

http://www.fourlightshouses.com/pages/the-small-house-book