I use dwc, I had 18 plants and that was tons of work...the easiest way to grow hydro with the least amount of thinking or work, Is ebb and flow/flood and drain.

you have to have drainage...you would be best off with a box filled with hydroton. You would need some type of drain...you can grow right in hydroton without rockwool.
...basically, you have too many seedlings for anything simple...Imho