You cant wrong with a SS wet tumbler. I actually made mine
out of a ac motor a couple of pulleys to step down the speed and 4" piping (good for.308 and shorter cases. Any larger you need to go 6" piping and pay ALOT more...
), Industrial bearings with the shafts. I think I spent about 90$ altogether. You may be able to get cheap bearings and wooden dowls to work... dunno.
Mine works like a champ. The reason I went from standard tumbling with grain type media to SS wet was that the primer pockets were not getting cleaned well enough and I had to do that by hand which was very time consuming, and annoying.
But the SS wet method does clean the primer pockets and takes less time to clean.