Check out filthyfletch's 30 minute aero build thread. For bubble ponics all you gotta do is eliminate the aero parts and put in a drain plug or valve. I built one for less than $30. I made my own pots out of plastic coffee containers.
$8- 17 gal. tote
$2-$4- drain valve
$8- air pump, on sale regular price $12
$4- $10- for airstones and tubing
Like patjack said, this set up will grow weed fast if you keep the water, nutes and, ph in check. Oh yeah, I used left over aquarium rock (pea sized).
Way better than spending the money on the commercial stuff. Filthyfletch will even build you one. Don't know how much though. Good luck.
P.S. Weed is always better grown in your home-made stuff.

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"There's no money for your issues so long as we're squandering $50 Billion a year on the drug war"- Ben Masel