I am going to make a bubbler nearly identical to the Stealth Hydro kit. I have a 14 Gallon Rubbermaid container 24"L x 16"W x 12.5"D I am modifying to fit either 4 or 6 plants, using 5" net pots. A 185GPH pump, 6-outlet adjustable drip head, air pump, and 12" air stone. Those are the base parts you have to have. The most expensive single thing for the bubbler was the water pump @ $12.
I am making two of these bad jacksons, one for my veg closet and one for the flowering closet. I am going to get a 400W MH and 400W HPS for the veg and flower rooms respectively. The beauty of these bubbler things is that once you are ready to bud your plants, you can just pick the thing up and put it in your flowering room if you have that type of setup, which is perfect for me.
Hope that helps!