You haven’t mentioned which instruments you have, but could you save space by using multifunction displays rather than having, for example, one for depth, one for speed, one for wind, one for autopilot, and a chartplotter that only does charts and radar?
I don’t have the limitation of having the main sheet attached to the binnacle, but having a newish multifunction chart plotter means I can operate the autopilot from the plotter, and with a separate multifunction display(mfd) I can read depth, speed and wind all from a single display, although not all three all at the same time where instead the display I want is just a couple of button pushes away. There are some mfd’s that will show several displays on different lines and all at the same time.
The mfd I have was located next to the companionway entrance, see photo, (good push from the tide that day !!) so that while running on autopilot and sat within the cockpit, it wasn’t necessary to keep scrambling around the binnacle to check wind, depth and speed, and if I wanted to put a mark on the paper chart the mfd would also display GPS information. However, having the mfd by the side of the companionway meant it was visible from the wheel, but not within finger poking distance, so it did mean when sailing on my own that I’d need to make a decision on which display I wanted most to see from the wheel. I’ve since added a wind display to the same area on the port side of the companionway.