I grew 4 plants dwc in 5gal buckets,30 plants in 2L hempy, 5 plants in organic mix, 9 plants in 2gal, 3gal, and 5gal of coco. They all seemed to yield about the same honestly. The most important thing is good genes.
No the tent would be outside of closet. My tent now is 4x4 which wouldn't fit...