read, read, read. There is a ton of information that has been written again and again.

however to answer your questions:

if they are all clones from one mom they should all grow the same in a stable environment.

you can veg as little as seven days from the clippings rooting.

you can harvest in less than 60days if the strain is right.

grow the seedlings into moms and fill your space with clones in 6" square pots.

this can be done with seedlings also but you might have a problem sexing properly??. (High Times had an article recently on 12/12 from seed)

your box like everyone elses here is unique and needs to be designed for the space you will be using. read on temperature control, adequate lighting, ventilation, grow medium, nutrients, problem solving, germination, clipping and harvesting.

I'm just ansering this 'cause you probably wouldn't get much of an answer otherwise. What you ask is asked in every fifth or sixth post. If you have a specific question, posting just the one question will not only help those of us asking the same question get answers, it will help you get answers too.

good luck with your grow, you will find that there are some VERY educated people here that will give you top notch advice that is worth it's weight in pounds.