You will need a big tent... At 90+ days before flipping, the thing will be a monster by the time it is done. OTOH, I have never grown a photo, so what do I know?
ROFL. That was seat of the pants math. I haven't grown a photo either, to be honest. But I've noticed looking at grows online, most people tend to flip around 4 to 5 weeks of veg, which is when auto's flip, and we end up with pretty similar size plants. I'd have to do some research to see how long to let 1 plant veg in a 3x3 tent before flip.