I do not care what anyone says using cloth . plastic or any other flimsy pot is a accident waiting to happen with it tipping , or falling over its just a mess period.
Specially in a tent where its a tight space, So depending on how many plants you plan to run ? and veg times .
Also depending on what style of grow medium you are wanting to lean to organic ?? chemical .
With organic using small pots, tends to lead to deficiencies as organic matter gets used up this is where you would want to stay away from organic style growing.
One of the most important goals is being clean as to not attract un wanted guests .
People worry way to much about aeration in soil learn proper watering techniques is what it all comes down to although its important people go over board.
As for your area i would use Walmart totes either 5 gallon or 20 gallon with out any holes in them make a decent soil that is fluffy and water less but more often but again this all depends on the what is driving your plants photosynthesis.
Weak light means less watering powerful lights more watering, you will figure that out as plants grow etc .
So again it depends what style grow your wanting to do personally i would grow 4 plants in there in either or 25 sq feet 5 gallon totes or bump it up to 20 gallon plus totes and run 2 plants in each tote if you like here are some pictures 5 plants in 4 x 10 area scrog. then 4 plants per 5 x 5 area and one plant 34 gallon totes 5 week veg from clone to give you a idea 1000 watts per 25 sq feet area or 40 watts per Sq foot