Well, deeper pockets opened up and I am allowed to get a solar system to operate the water and air pumps, as well as the potential heater needed to keep the water pleasant in the winter time. It means more research, but who minds that?
I've decided to leave out the swirl filter unless the GB isn't sufficient for filtering solids. I will still build it, just to prove I can, but I doubt it will even be an issue with worms in the medium.
ST has been rethought, and I will be using a 50 gal. pickle barrel on it's side, under the FT.