I just made a rather cheap drip stake system thats working great for me. It was my first time making a hydro system too, and I had no problems.
You will need:
A leach tray or some other kinda tray with a drain on the end. I bought this for $10 at my local hydro store:
I inserted a 1meter rockwool slab into the tray which I set my 6" rockwool cubes on.
For the drip stake system you will need:
1" PVC Flex Tubing (I think this was $1.50/ft @ Lowe's) - I got 36" for my setup (1 meter rockwool slab). This is the main irrigation line that the drip stakes will come off from. I capped one end off with a threaded end cap, and the other I inserted an elbow joint to connect it to the pump (each was like $1):
To insert the drip stakes, I drilled 5 small holes evenly down the length of the flexi pvc tubing. In each hole I inserted these grommets with double ended nozzles (the thing on the left - the right piece isn't required). I found them in the lawn irrigation section at Lowes for like $5 for a 5pack. I used silicon sealant around each grommet to ensure a good watertight seal:
I ran 1/4" tubing off of each nozzle and attached a drip stake to each of the lengths of tubing ($0.25 per drip stake):
You will need a water pump ($20-$30):
Which you will place in your resevoir (Rubbermaid $3.50):
Cut a hole in the lid on one end, to run the tubing from the pump to the main irrigation line.The drain lines will run back into this hole too. I used 1/2" clear vinyl tubing ($0.50/ft I got 20ft but didn't need that much):
Thats $66.50 so far plus whatever it costs for your grow medium (rockwool).
I only have to water, maybe every other day or every 3 days. I just plug the pump in and wait until the water starts to drain back into the resevoir. I placed screens over the drain holes in the tray so that no debris falls back into the res.
I didn't mention the pvc table I made to raise the system up 2ft so I could place the reservoir underneath. It was made using 4 5ft long pvc tubes (1.25" diameter). Each was $5. I also needed 4 elbows and 4 T-fittings (maybe another $10). I used them to make a makeshift support: