Think of how you can break up the interior space for different uses and privacy. Walk through the daily routine of a family living in the shelter. Where do the parents sleep vs the kids. What is the space used for during the days? How can you create removable walls or barriers that assist with the different needs. If you can, build a prototype, you will learn a ton. Even if it is not the real material, mock this up in size and shape with cardboard of something inexpensive. Sit in the space and see what needs come to mind when you walk through the daily routine of the inhabitant. Good luck!
thanks for checking out my entry, really appreciate you taking the time. movable dividers are a good idea, but perhaps for larger spaces. i thought for a small space one convertible piece of furniture might work. therefore i designed a convertible sofa, bed and table--one convertible piece of furniture that can take care of many of a small family's needs.
drawings look good, actual photo looks scary. Not sure the design is sound, though I know arches done correctly are. Would like to see a true prototype also