I don't have the arthritis but I figure the media in my tumbler is cheaper than my time so I use the tumbler too. Like GB and others I use a light lube that comes off easily but even wiping cases, I would have to use a solvent of some kind to get the cases oil-free. Water and brass is not a good combination unless you can dry them (don't put them in the oven over 200-250 degrees F!) quickly.
PaulS