Clear containers are not good for roots. The ones you decide to veg while the others are flowering are going to be beasts. If you are vegging for 3-4 weeks until you throw the first batch in flower and then wait they are ready to chop, that will be around around 3 months of veg time on the second batch depending on your strains. Then your tent will most likely still be too small. My suggestion is to veg them all for about 3-4 weeks, take cuttings off the best ones and then flower all of them. Assume all your plants will double in size when you flip them and flip accordingly. If you are wanting a perpetual harvest then plan accordingly and rotate some in every month and based upon an 8 week strain you will get a harvest every month.