As Bruce stated if your planning on only cutting with no router they can be in the same area. Yard
signs & cardboard are clean to cut with no debris.
If you’re cutting wood, ACM, acrylic you’ll want your cutter/router in its own room or zoned off area. They are messy to cut and you want your flatbed printer as clean as possible. Firesprint has a tour of their old shop on YouTube - might help .