One thing you have to realize is that your plants size is going to be limited to the rootball size. Go with a 5 gallon bucket to get maximum results hell you can even go get a 25-30 toy bucket from walmart, the ones with the rope handle, cut some styrofoam to fit the top, cut a hole in the styrofoam and put your net pot in there. I saw some guy grow a 32 oz plant using that setup. Take a look at my log (not updating it anymore) But it shows an easy DWC setup, a bucket a net pot and some tape. After that all you need is an airstone and a pump. I upgraded to solid black buckets recently b/c they are better than just black duct tape.