Like about 75% of reloading gadgets, you don't need a case tumbler, but it makes life easier.

I made one for about $10, here's how:

1. Took a cheap box fan ($10 from Walmart) removed the rear screen.

2. Using a pair of tin snips, cut off all of the blades except for 1.

3. laid the fan face down.

4. Securely duct taped an ice cream bucket ( rightside up with a lid) onto the frame of the fan.

5 using tin snips, cut an opening in the screen so it could be replaced around the bucket.

6. filled the bucket 3/4 full of corncob media.

7. drop about 50 '06 sized shells or 200 .45 auto shells in the bucket and turned the fan on. The amount of vibration can be adjusted by fan speed or by securing weights to the remaining fan blade.

Its not pretty, it takes up alot of floorspace when its running, and you need to secure it so it doesn't walk off and unplug itself while running, but the price is really hard to beat.