I mean what are we talking about as far as time goes with SS? I usually throw them in the vibe for 3-4 hours with a few flicks of Mothers polish off my fingers.
You can get by with about 1 hours in the SS tumbler, though most are tumbling for at least several hours. My biggest issue with SS tumbling is it takes way too long to do large amounts of brass when you are limited to small batches and are constantly having to undo the 6 nuts, fill with brass, fill with water & cleaner, secure 6 nuts, tumble, undo 6 nuts, drain water, separate brass from media which takes, and dry the brass before repeating all over again. If you only foresee yourself doing small batches like you say, it may very well not be an issue for you.
It's just a slow process by comparison of tumbling with my Dillon CV-2001, which runs for the same amount of time and is just as quiet, only has one nut to undo and the media separates much easier. Plus I do not have to worry about inspecting every single flash hole to ensure that a piece of SS media is not trapped inside of it as it sucks bending depriming pins, which will happen very easily should they meet SS media.
SS media is great for prepping your match cases or low volume loadings and getting that brass ridiculously clean, but I do not feel that it is the end all be all solution as it has a number of drawbacks. The SS media also will get your cases so clean that if you are doing bulk loading of straight wall pistol ammo that you will want to use a light coating of a spray lube to help smooth out the action of a progressive press.
I love my ultrasonic cleaner for some things, but lets be honest, they suck for cleaning brass. I've experimented a lot with them, they just plain suck at this particular task as they cannot polish. Sure you can clean the cases and then polish them, but now you again have to deal with drying wet cases without the benefits of the polishing action of SS media.
Don't get me wrong, I like SS media, just not for everything.