I keep two of my "extra" machines each in a rolling duffle bag type of case. Then I can easily roll them into a corner, or under the long arm or desk. They're easy to move around to vacuum behind, or to get at whatever they might block (one sits in front of our front door - which is not a primary entrance, we have three other doors for coming in/out.)
If I decide I'm travelling out to a sewing day, either of them is ready with all the machine needs for sewing in the bag.