Nice studio! Well done on the spacing so far. Things that helped me a lot in a smaller studio was utilizing the walls, and having dedicated spaces for everything. Our walls have hangers for some instruments, gig bags, and low hooks for frequently used cables. We also use an old dresser with drawer dividers to keep gear organized and away from dust. One bookcase for sheet music, set lists, with the top shelf for the metronome, and little bowls for picks. Every year there seems to be more gear and cables, so having a specific home for everything keeps it neat.