i been doin soil for the last yr or so and i just started dwc in a 18 gal rubbermaid tub with 10 babes on each . i set up 2 tubs with 10 sites each for about $80 . thats including a pump with 2 air outlets . i veged for a month and they took off way faster that soil . the leaves even feel alot softer and healthyer. it sux haveing to change out water tho. i got 6 18 gal tubs and at water change i have to dip it out with a bucket and fill the same way ... thats dumping 18 or so 5 gal buckets then filling with 18 . thats alot of work so think about an easy way to drain and fill them .. try to not be carrying buckets like my dumb ass. BUT you get 10 nice plants in the same space u could only put 2 5 gal buckets. im in the beg of second week of flower. i hope to put up some pics soon hope this helps.