what would be the best way to get enough ventilation for the 1000 or the 600 in my space? about what might it cost? it will be in a closed off section of a closet.

i plan to start with soil, then maybe upgrade later on

also , you said make a 4x4 flowering chamber, but i only have 2.5x3. what difference will that make?

im also still unclear as to how many plants i can have going? both in veg and flower?