Have fun with your re-model, Mike!! In the room where my Handi-Quilter (mid-arm machine) lives, there is carpet on the floor, and I wouldn't recommend it. I can't tell you how many times I've stepped on a pin that I didn't realize had hit the floor because I couldn't hear it! The carpet is also buckling somewhat where I have to move the HQ out of the way to take photos on the design wall.
In my sewing area, I have a wonderful very light colored vinyl floor that is printed with a grid type design, so I can use the floor to damp block a quilt into shape. Also, I starch hunks of fabrics before I cut the shapes for piecing, and can just spread beach towels on this floor, and not worry about it causing damage. When pins hit the floor, I can hear it, and pick them up immediately.
Hope you post photos here of your new space!