http://images.intomobile.com/wp-content/uploads/2009/08/the-shack-palm-pre.jpg
And can be upgraded to become bigger, have a basemant, enchanting, smithing, and all that. As you make the house bigger, so does the farm. The cost of upgrading it would be significantly more than your current houses, since they'd all have to be built onto the house. You can purchase it from the same guy that sells you the Whiterun home, for something like $10,000. Upgrades are linear and cost a few thousand to start, for labor/distance or whatever and significantly improve your house. I suggest linear because the house would probablyhave to be built up in a set manner.
The Containers you start out with could move as you upgrade, so the items stay. ie Chest1 at the foot of your bed in the small shack will move to your bedroom when it's installed.