Looks like a good sytem. I run a small 6 plant drip. I have 2 now. Drip is the way to go I think you will have fun growing hydro. Your shure it will fit ? with a 400 in a tent you can hope for 28 to 60 grams per plant. Remember keep them small so the light gets to all part of the plants. You want to start flowering 12/12 at 5 sets of leaves or about 12 inches. BB x NL should be good. Sounds like your doing the home work, that's good. Yes soil is easy but wait till you pull in a good harvest of hydro. It seems to grow right in front of you sometimes. You will also need a PH meter and an EC, tds, meter. You might get that in your budget. Have you picked nutrients yet ? General hydroponics seems to be the most used or I hear dutch masters is good too. Good luck. Let us know what happens. Anymore ? I'm shure you will get a few opions, take the best and run with it. Remember once you go hydro you never go back.LOL