A simple and easy one that might work for you is covered corroplast.
Mine are covered with fleece, but flannelette or batting could be used.
The corroplast gives some rigidity, so you can lean it against a wall or furniture.
Lightweight, it's easy to move around.
You can slide it behind a piece of furniture when not in use, or under a bed, or???
Once you start with one design wall, you will soon have many more!
Then you will soon wonder how you ever quilted without one ..... or many!
Some put their design wall on the back of a door, or even sliding doors.
Also, do you have space on a hall wall?