Hi All, I would like to convert the rumpus into a study room. The size is 7.5 x 3.5 m and the floor is currently concrete. I would like to install something that I can take when I move out of the (rented) property and that will not leave marks/damage the original concrete floor. I plan to have office chair so I may need something that will not be damaged with the chair wheels. Low/medium budget. Thanks in advance for any recommendation you can give me.