Home made DWC. Bucket, airpump, airstone, air hose job done.
Im with him,
I got a aqua tray with matching rockwool slab both 1meter £10,58w 6500k 5ft flourescent tube and fixture £8 then a pump £15 and used a square plastic storage container as a res.
I only done this to start them and I will be going to air buckets and hps.
You basicly put tray at a ngle leaving bottom end balanced on the storage container/res with pump in and connect water pipe,pop holes in and use as a drip system.
You could do full grows like this,forgot to add air pump £15 with airstone.Cost was around £50 quid but if I was only doing say 2 plunts I would of bought 2 oxy pots that come with just a air pump and air stone,then just got the flourescent tube or hps over it.
Here look at mine.
http://s640.photobucket.com/albums/uu128/TRIXTSTA/plants/?action=view¤t=MOV00499.mp4
Ive then moved in to this
http://s640.photobucket.com/albums/uu128/TRIXTSTA/?action=view¤t=MOV00500.mp4&newest=1
see the bucket there in?I will wait for roots and have 1 in 1 of them buckets x2 then Im putting rest in to 10l buckets with just a air stone so 2 90 litre buckets and 6 10 litre buckets.
My avatar is 1 plant in a 90 litre bucket and the tent was 1.2x1..2x2meter tent,the thing was bursting when I finished and I got 15 oz dry under 1 600w hps.
a pump and a few buckets with lids and small plant pots is the cheapest for singles but if your doing a few you could use a tray like I did.
I payed £7 for 7 buckets and my air pump was like £12-15 which will easily do 4 so work it out
No doubt youl need lights/nutes and a carbon fiter which is the most expensivest.
Trust me you can set up pots or trays cheap,its the light/fans and fiters that cost.
Good look,hope ive helped
hell, you could use a spare watering can if you've one lying around, DWC is so brilliantly versatile.