There is no correct answer. People are just going to say how many plants they grow and what method they use. It's the same with any "Best" question. Be it lights, nutrients, genetics, etc... There is no best. There is only different opinions based on what an individual was successful with.
Just throw some plants in the tent, give them light, water, and food. Grow them and figure out what you like and what you're successful with. It might take a couple grows but you'll find your rhythm. 21 posts in this thread with most advocating something different than others. There is no exact science. Too many variables. Strain, plant size, flowering time, etc...