For the least amount of water Hempy Buckets would seem to be a choice ,as for fertilizer amount that question is directly related to what strain your growing , some strains kick ass using 400 ppm or less while others prefer 1,000 ppm or higher , ive got a blue widdow strain that wont yeild shit with anything less than 1,000 ppm durring the 1st 4 weeks of bud & i raise 100 ppm a week from week 5 thru 8 where the last week their getting 1,400 ppm & eating 200 to 300 ppm per day , im sure you could get by with 100 ppm the entire grow if you used zero ppm water to start with but would it be enough for the plants to achieve max yeild is anybodys guess.
Nobody is gonna be able to give you any usefull info other than their best guess based on their grow , the problem with giving you a straight answer lies within there being too many variables which affect growth rates & yeilds , strain , water hardness , grow medium , room condition ect all have their own affect on how much your plants can consume .