You could put about 40 plants in there if your were growing them from clone but it would be a growing style called SOG, Sea of Green, look it up if you don't know. On average you could put about 5 to 10 nice size plants in that area, but a bathroom fan will probably not do much for ventilation or not to mention smell. And a clone from a clone is just one plant in the same. Unless a disease was introduced into the mother, the clone will not loos really any potency, and the same when you take a clone from a clone mature enough to give a clone.
Adieu