I read all this material and decided it was worth a look.
I use a Harbor freight double ($55+-) the stainless pin tumbling media, in my mind over priced... and some citric acid - great deal at Essential Oils, Soap Making Supplies & More | Bulk Apothecary
I predict you will be pleasantly surprised at the price. This will last a long time.
Brass has been sized and trimmed - primer pockets swagged if called for.
I use a small kitchen scale so as not to exceed the recommended load, I put in about 45 .223 then add pins to 3#14oz, then a splash of citric acid, maybee a tablespoon - made up by adding a TABLESPOON of the powder to a quart of water -, a drop or two of dish detergent, and top off with water to go to the recommended weight for the cylinder. A couple hours and I dump them into a small bucket and flush till the water is clear.
I have a set of cartridge sorting pans and run the brass in the .223 pan, shaking them to separate out the pins. Don't be naive either you will miss a pin or two. Then they go to my $19.00 food dehydrator from Walmart a few years back. I set it at 135. About 45 minutes and they are dry. At this point all the prep has been done and I give them EACH one last look and bag them to keep the air away.
Nice to be able to look all the way down inside and make sure everything is as desired.