OK here you're making a little assumption..
To change the rotor, you will need an impact driver with the correct metric Allen bit, or you can forget about it. Those rotor bolts are in tight, and they have blue loctite on them too, so without the right tools you WILL strip them.
Then you will need to clean them off - all 6 of them - I found that using a spinning metal brush wheel works best (of course using gloves and eye protection), and then make sure to re-apply blue loctite when refitting them.
All in all, I would say it'll be a helluva lot less stress if you can make sure to be prepared to rest the bike on something while the wheel's off - a solid wooden box or strong plastic bottle crate may do the trick. I wouldn't rely on balancing it for more than a couple of minutes..