Luckily, there is no rule that says the jelly roll quilt top must be done in one session nor one that says you must not iron until all the strips are attached. If there is, I have broken it several times!
My ironing board is across the room from where I sew, too, and for the exact reason you suggest, a break. However, on a health note, my dr was concerned that I was sitting in one place for too long while sewing. She mentioned the possibility of blood clots forming, so I explained my set up to ease her mind. It also helps my back shoulders, neck etc. to move around.