We've talked about an appliance garage with cabinets above, but I kind of like this sliding door option. [Thin sliding cabinet doors in a kitchen by Germany company Beeck Kuchen conceal countertop clutter.
use two shelves from one of those wire shelving units and zip tie empty thread spools in all four corners and the middle. Awesome idea for wall storage! I have a ton of empty thread spools I've been trying to think what to do with!