You are talking about a SOG (see of green)
Depends on what strain you are growing. Some strains mature faster than others. Once you figure out the strain and time... you need to do math... ok.. I am using... (whatever strain) I want to veg it for x amount of weeks ( somewhere in the 3-4 week range using aeroponics)
Then you need to be able to move that veg cycle into a seperate grow box/room for the flowering cycle. Depending on your strain, it will mature in somewhere from 6-10 weeks in flowering.
Now... where the math comes into play is when you grow mothers... and clone off of them you want to be able to have enough mothers to keep taking clones off of every two weeks. Meaning...
week 1 - clone and wait for roots...
week 2... wait for roots if you still dont have them... on the ones you do have roots.. move them into the vegging room. After two weeks, if you dont have roots on certain clones... chances are you are not going to get them. (just my experience) Lets say for all purposes to make this posting easier... you got roots on all of them and that they are all in the vegg cycle now.
week 3 you should have no clones and all of your previous clones in the vegg cycle. Take new clones.... and wait for roots. Maintain the plants that are in the vegg cycle.
week four you should have roots on your new clones - move them into the vegg cycle. At this point in time, if the plants that were in the vegg cycle are big and strong enough, move them into the flowering box/room or you can let them keep growing for another week if you want.
week 5 move the first batch of plants from the vegg into the flowering area/box/room if you have not done so already.
week 6 take new clones and wait for roots
You keep doing this same process - taking clones every two weeks.... moving them into vegging stage and moving a batch of the plants from the vegging stage into the flowering stage.
What you need to figure out now is how long does it take for the flowering process to complete. If you have a strand that is a 6 week cycle... (we will use that for example) you need to have the plants in the flowering area/box/room for at least six weeks. (just because the description on the seeds may say 6 weeks... doesnt mean that it is a definate time table.
Ok... so if you have a strain that flowers and is ready in 6 weeks... (what we are going to use for example) every two weeks take clones.... and about a week later move the clones into the vegging area - Every two weeks move the oldest and biggest vegging plants into the flowering cycle. Keep repeating this until the plants are fully done in the flowering area.
Lets say you are going to do a batch of 25 plants at a time.
Week 1 - Take 25 clones ( I usually take a few more than what I need) so maybe take like 30 clones This batch will be known as "A"
Week 2 - 25 clones have roots... move "A" Batch into the vegging box.
Week 3 - take 25 clones This batch is known as "B"
Week 4 - 25 clones have roots... move batch "B" into the vegging box --- you now should have 50 plants in your vegging box/area/room Batch A and B
Week 5 - Take 25 clones Batch "C"
Week 6 - Move Batch "A" from the vegging box into the flowering box - move batch "C" 25 clones that have roots into the vegging box. You should now have Batch "A" in flowering -batch "B and C" in the vegging.
Keep repeating this same process until the first batch of plants Batch "A" is ready for harvest. At harvest time, Batches B,C,D should be in the flowering area and batch E.F should be in the vegging area with new clones (batch "G") rooting.
Keep following this same process. every two weeks.
As for what you need... figure out if you are going to grow in soil or media or if you are going to use hydro/aeroponics. Hydro/aero will grow faster plants but, you can screw up and loose all of them real easily. I am familiar with aero myself.
If you go with a aero/hydro system, you need to buy or build systems for them with enough room to do exactly what I said every two weeks.
You will also need three different types of lights.... flourescent for the clones... AN Hid (I reccomend a MH for vegging but you can also use an HPS) and then another HID for flowering (HPS only not MH)
Metal Halide (MH) are high in the blue green white spectrum that induces vegg growth. High Pressure Sodium (HPS) induces flowering and is high in the orange red spectrum.
Plenty of fans for moving air in and out of the grow areas... and if you are going to do this, you really need to have a carbon scrubber to remove the smell in the air. If you do go wtih the hid lamps, you really want to invest in light reflectors that can be ported (you can cool them with air) You will then need an inline fan to push air through them and flexible ducting to push the hot air out of the grow room.
This is all a description of how it SHOULD be done.... and it will cost a few bucks to get it up and going. I am a mechanical Engineer and can help you with ways to design things and where to get them all for much cheapier than everything being bought as a kit or off of a website. How big you want to go is your choice.
Contact me anytime for help.
Cheers