How to build a bathroom?

Ok so after my first successful closet grow, ive got a new space a spare bathroom. all of it.

it measures in around 6ft long and 3 1/2 ft wide roughly 10 ft tall.
my mother to one side of the sink, bubble cloner with wall mounted t8 on the other side.

my concept is to build a cabinet of sort above the toilet measuring around 5 ft tall 1 3/4 deep and 3 1/2 wide with two shelves mounting hps to the bottom of each shelf.
pc fans for venting with a duct and fan running from the top through the ceiling and feeding out a roof vent.

this gives me enough room for two plants deep per shelf for a somewhat mini sog and allows them to be sealed up for the dark period while the clones and mother run 24 hours.

i was thinking two shelves of ten each under one 250w hps per shelf.

any input on if this would work efficiently?

and my last question is this obviously the plant height has to stay somewhat short for going from clone to flower with 1 to 1 1/2 ft plants whats the smallest containers i could use so as to not add to overall plant height? ive seen people use 20 oz bottles cut in half but sounds like a easy way to get root bound, maybe 2 liters cut in half ?

im trying to make the most of my little room and looking to the vets for help.
ill post pics soon.
 
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