If you're only growing 4 plants in a 4 x 2. I'd use bigger pots. Try to use up as much of the bottom space in the tent with soil. 4 to 5 gallon pots with 2 to 3 month veg and you'll fill that tent with colas.
Hey mate! Yes of course but give them a little veg cicle like 3 -4 weeks, but i personally if had that grow space I would grow only 1 in a larger pot, like 18.5L, L.sT and topping !