Sounds like a nice setup to me. I think I've got it.
bottom of res -> valve -> farms -> remote bucket -> top of res

Full recirculating. Plus when you turn off the valve, the pump will send ALL liquid back to the res where you can then do a good solid PPM and PH check.

It's almost like a waterfarm/recirculating dwc/flood drain, lol

So xcrispi, why havent you added some aero sprinklers you lazy bum? hehehee

imp: