Finally built myself a nice 3D printer enclosure from IKEA cabinets.
Basic idea is to take a shallow (20cm) and a deep (40cm) cabinet frames and to stagger the bottom/top panels and wall panels, making a nice single-piece 60cm cube. A bit more info with a short how-to and a few ideas and nuances.
My Swedish brain could not make sense of that. But it finally clicked: BESTÅ.
For my old Prusa i3 MK2 I had two LACK-tables on top of eachother, with acrylic from their cheapest picture frames for sides.