simple, plenty area for storage, inexpensive.
kitchen open to living space, kitchen table used as dining table with fold-able chairs to save space,
master bedroom with its own bathroom
closet in corridor for washing machine outside the bathrooms
I preferred not to open rooms to the balconies because it's not heat insulated which would cause problems heating the place in winter.
3d models used:
Kitchen modified, original by Hilux, http://www.blendswap.com/blends/view/72371