Grow Box design

okie so im about to finish my first grow , with very limited supplies and lights.
(can see here https://www.rollitup.org/cfl-growing/268863-extremley-low-budget-grow.html)

so i decided since i did a closet grow and my closet is pretty big , ill stuff a grow box
inside the closet.

my mission : one plant with at least 2 oz (about 40 grams)

i wrote most in the design picture , but ill explain .

The design :
box - 60x45x50 (height*width*length)
inside will be painted white.
lights - both sides are duplicated :
veg - 2*28w 1700lm cool daylight 6500k
flower - 1 cool daylight will remain for mix spectrum
1 warm white 2700k 1600lm 30w
top side will form a triangle of :
veg - 3*28w 1700lm cool daylight 6500k
flower - 3*30 1600lm warm white 2700k

air flow - 2 pc fans 80mm for intake
1 pc fan 80mm for outtake.

i was wondering if theres enough room to grow such a plant for my mission ?
would i have to trim to get that kinda results ?
is there enough lights ?

and by all means , any opinions and suggestions are very much welcomed . thanks. !

First of all congrats on moving up. You need to look at your air flow as your biggest issue. You need to have the intake on the bottom and exhaust on the top. That way your pulling warm air out and cool air in. Space is what you make of it just look at the guys who grow in pc towers. As for those yields off of one plant good luck especially indoors. Do some more research but I am pretty sure you are going to need more light. I use 400 watts MH in a 24x30x48. Good Luck !!!