Personally, I'd ditch the drum tumbler and stainless pins and go with a regular old vibro tumbler with some corncob media. The drum is a mess because you have to change out the dirty water, then you need a sifter to get all of the little pins out, then you need magnet to capture all the pins and sort them from the dirty water, then you still have to dry your brass or they will tarnish from being wet. If you're doing a batch of 500 cases or more, then the wet tumbler might be worth it, but anything less than 500 and it's too much work. Vibro tumbler and corncob media is much faster, fewer steps, and a lot less hassle.
You'll also need a powder measure of some kind. Try the Lee Classic cast iron measure that goes on top of your powder through/flare die.
And you need a proper reloading manual like the Lyman, Hornady, or Lee reloading manual.