Esteban has a good idea. I was going to post something similar, but don't want to step on toes at all. I suggested DWC because when you have a problem, it remains isolated to one bucket, one plant. The problem with recirc systems and aero is that these methods require good knowledge and maintenance. You'd like to think you can put a recirc system on and ignore it for a week, but that isn't realistic unless it's a self-adjusting system. Potting soil reduces the need for lots of maintenance. Hydro is great but you've got to do it right as there's not much room for error.