For the basement stairs: cabinets, stairs with flip up steps and very narrow stairs. Each step goes up one at a time for each foot. It is sort of spaced so you are putting one foot per step with a steeper step. Very space-saving.
++pic only A great tiny house solution for single level bedroom. Murphy Bed and sofa in one. Add an ottoman with storage for a foot rest during the day filled with your pillows for the bed - Montana Murphy Beds