obviously this is for indoor grows, but if you are able to, and want to do things REALLY cheap the 1st time round grow outdoors... total cost for me to grow 3 plants outdoor was 3 x 20L pots which we already had, 25L potting mix, 25L mushroom compost and 10L of homemade compost containing fish scraps etc... done this way it cost under $50 aud for approx 3-6 ounces of dry decent weed...