Installing a corrugated tin ceiling is a unique way to get a minimalist/industrial vibe in a room. The metal is attached directly to the ceiling joists with screws and is easy to maintain.
If you don’t mind the ceiling looking like a commercial building, a drop ceiling is an economical coverup. The project involves installing a grid system and placing ceiling tiles into the openings. It’s not a difficult project if you know how to use a level, and it’s much more economical than most other methods.