What are your thoughts on something like this for your storage wall between the middle room and sitting room? (we can design it so that each of the compartments has a particular purpose for your specific objects)
We've used a similar corner shelving unit to create space in a small 7 by 9 ft room. It's a great, easy shelving solution for small spaces (although installing it was a bit tricky as the walls weren't plumb.
DIY Modern Solid Multifuncional Organizador de escritorio