Harbour freight tumbler (5# size, $38), 5lbs course walnut ($18) (before de-priming), a gram or two of Mothers mag wheel polish, run for 1-1.5 hr.
Probably tumbled 1000 rounds on my first fill of media and it's still fine.
Harbour Freight is the best source for media. Still have 9/10ths of my box left.
About every other batch, I'll through in a dryer sheet to get the fine dust out.
Not having Windows on your computer is like
not having bricks tied to your dogs collar.
The shin bone is a device for finding furniture in a dark room.