mornin guys, welcome SW.
not try in to step on toes here, but I'm pretty sure that chart is specifically for operational costs per month and OZ per HARVEST. there are other charts and info in the GWE website that break down other factors such as footprint coverage per light type/wattage, distance from plants, etc.
when I first saw ur tent on its side like that I was thinking WTF? little more coffee and started thinkin wow, that could actually be pretty genius!
however... you may be setting yourself up for a looooong series of panic attacks with height limitations and the number of plants you plan to run. seriously.
plant finish height in this setup will be limited to about 24 inches. research your strains and plan accordingly. even strains that grow smallish will need training to keep them out of your lights later on.
also, with 14 plants you will be severely limited once again by space available. you will need to train them. training for height and light makes plants wide and believe me you have no idea how much plant you really have til week 2 or 3 of flowering!
you may be able to pull it off by training them very low and scrogging them, but you will still prolly want to keep the veg time under 6 weeks.
do your homework. go to the website and STUDY EVERYTHING that pertains to your grow. don't skim...STUDY. I didn't see any sprouts in the pics, but if you already planted then you better get serious asap!
personally, if that was my setup, I'd cut 14 plants down to 8, manifold to 8 tops each, fab up 2 scrog nets and put 4 plants under each, and lights over each. by week 3 flower those nets will be FULL. if I wanted more plants, I would set up another tent. even a new guy like me could reap an easy 1.5 POUNDS from 8 plants and 2 600w hid lamps. much more if I was any good at it!
check out my scrog setup. thats 5 plants of a short growing strain almost 3 weeks into bloom. just this week I started letting the tops grow up through the 3ft×4ft screen. all manifolded to 8 main tops. this is an excellent control method when height is limited.
hope this helps...now and later. good luck and keep posting!
shit. gotta switch to my phone to send pics!