Or build your own DWC - it's just a rubbermaid/sterilite container (lightproof it with your choice of material, and an aquarium bubbler or two with stones - $20-$40 dollars. Cut the hole(s) for the net pot(s) in the lid, fill net cups with hydroton (or your choice of inert medium), add your choice of nutrient mix to the reservoir (although I would recommend bio/organic nutrients for simplicity), add seedling(s) and have at it. You might spend another $10 or so on pH drops or strips. Otherwise you'll already have most of what you need (lights, knowledge, grow space, etc.).
For the journal record, I put out 15 liters of tap water aside last night to dechlorinate. Will do a reservoir change this evening with it and add their first nutrients (PBP Grow) at 1/4 strength. Will also add Liquid Karma at 1/4 strength to start and see how it goes. [PBP-G = 7mL/4L with 15L reservoir = ~25mL; LK = 5mL/4L with 15L reservoir = ~ 18mL]