If you go sea of green (SOG) you can keep your space way down while still having a continuous harvest and wiggle room. You could get away with that many in 150-200 sq feet (15x10+ room, divided into 2 spaces) for a zero veg time SOG and a few mothers. That many plants take a lot of work, especially while you're still learning, and cloning/caring for mother plants can be tricky at first so good luck!