prebuilt grow cabs are way too spendy for what they give you.
mu suggestion would be to set up mothers and clones in the slopped ceiling portion using t5 flourescent lights and then take your clones directly from rooting to flower in the big section with a 1000watt light. soil or hydro is up to you . i prefer soil for that organic taste . you may prefer hydro for faster growth.
take a look at
www.htgsupply.com for the t5 and 1000watt HPS