Check out SH Hydroponics instead of the 5 gal buckets you can use a 4 gal or 8 gal rubbermaid storage container and put 4 to 6 net cups in the lid. You can down load the step by step instructions complete with a list of everything you need to build your own cheap. The only thing you will need to buy from them is their irrigation manifold for $9.99 and some 6 net cups $3.30, rockwool cubes and expanded clay. All for about $20. The rest of the stuff you can get from LOWES cheap.