Speaking from personal experience doing DWC, I think you would do well with a well-crafted micro krusty bucket. Get 2 one or two gallon buckets of the same size that are stackable with an inch or more of room between when stacked. Drill a bunch of BB-sized holes in one to use for the top bucket holding hydroton and hygromite (a phosphorous and silica bearing volcanic rock mix,) and leave the bottom bucket as a micro reservoir (it will hold at most 3/4 gallon of nute solution.)

Make sure you have an air line that can slip between the buckets, and down to the air stone set in the bottom of the 'bottom' bucket. that aerates the nutes, and pushes bubbles up and over the roots in the top bucket. Make sure you have a GOOD pump, you want this stuff to get as much air as possible. From there, keep your pH controlled and nute strength set, and you're golden.