I really like your set-up, and I would recommend LED for the flowering, maybe before. With my limited experience in the field, I am blown away with the punch of the new LED grow-lights. In 45 days, under 24/7 light - I have females showing, on nice bushy plants.
From what I know, the smallest LED of any value, is the UFO, which is 90 watts, there might even be a smaller version. The $30-40 panels (where they don't tell you the wattage, because it's like 5 watts) are a waste of money, other than for decorative purposes.
Maybe you are planning on a larger set-up, but I think you could grow a substantial amount of material, in an enclosure only a bit larger, and two three times higher - just add light and air circulation.
And odor control - but you know all that.