The Bosch unit has a hose that attaches to a vacuum, so there’s no battery required. The beauty of the DeWalt one that I posted (and the Bosch one that was just released) is you can still easily see where you’re drilling.
Ah ok, that rings a bell to me now. I do see the advantage of the battery powered vac to be huge if I were doing a lot of installs like you. I wonder if you could attach the new Bosch to a battery powered vac? I have the dewalt 20v vacuum (not the hammer vac) and I bet suction wise it would work well.