I would have the exact setup I have now, no changes. This is because I'm on my second or third evolution of the brass cleaning process at this point and have learned from my mistakes.

The first mistake I made was not going big early. The price tag on the huge vibratory case cleaner put me off at first, and then I ended up buying it after buying one that turned out to be too small. I love the stainless steel tumbler (the ultrasonic might do the same thing) for initial cleaning, and I have bought the biggest one on the market at the time I could reasonably afford. There's the one I have, and at the time the next available model was a commercial setup with ~$1,000 price.

Get one of the big vibratory cleaners that takes walnut or corn cob media.