That's what I mostly hear, idk though. Expensive I guess, to do things right and go big. But a small rdwc setup with a few buckets and an airpump will run the same as a couple bags of good soil. I hadnt successfully finished my first soil grow by the time I had almost a dozen hydro plants goin, and aside from figuring out that I DO need a RO setup, it's been mostly smooth sailin. So I disagree about the difficult part, I think being able to precisely control my medium is way easier than figuring everything out in soil. Plus, who wants to wait 4 days to see if feeding the plants helped or not?