I plan on either sectioning off a part of my basement, or using my 5x5x8 closet. So space really isnt too much of an issue. and i plan on flowering 5 plants at a time with 5 clones vegging. How expensive does it actually get? I plan on using a 400 watt HPS for flowering and a 125 watt Metal Halide for vegging. i plan on using a 20 gallon rubbermaid tub as a reservour.