Once you figure out the floor, don't forget to put down something to save your back when you are running the LA.
We have carpet under ours. Luckily, it's like an indoor/outdoor very low maintenance type carpet (the building is a former church - it might be an industrial grade). We are lucky in that we are not directly on cement. When we bought the machine, we were advised to get the puzzle piece mats and use carpet tape to attach them to a plastic floor runner. We found it not necessary, since we are not on concrete. It might be necessary for what you are going to be working on.
HTH! Shel