Designing your own vertical herb garden is a fun project. Vertical gardens allow you to grow herbs and some fruits and vegetables that do not require a lot of soil, such as strawberries or lettuce. Growing your own herbs for cooking or for medicinal.
outdoor shower, corrugated metal - Could almost get away with one of these instead of trying to fit it into the inside bathroom. For a few months in "winter" it would be a bit chilly but still--fairly practical.