First Hydro Grow, Help Please!

Hey guys, so taking advice from a friend I have decided to start a very small grow in my apartment (in the city) to get the hands on experience before I up and move to cali. I also need to save up more money so this is a great way to do it. So a few questions for you.

1. Does anybody know a great site to order guaranteed female seeds?
2. I plan on buying grow tents, most likely two smaller tents one for vegging and one for flowering. What watt and type light should i use for each tent?
3.I know the systems in and out, but am still undecided which is best to use. I am a first time grower but a fast learner and no dummy. For using two grow tents, what is the best system to use that would give me the best yield in the shortest amount of time? DWC or Ebb n Flow? Maybe even Aero? DWC and Ebb N Flow arent too expensive and seem simple enough to learn but,
- which has the least maintenance?
-Can both be separated into a veg and flowering room?
-Can they both be setup into Sea of Green and how exactly?
4. If I do not have the means to provide fresh air from the outside into my grow tent, should I put a CO2 tank in there, if so how much?
5. I have read that one of the most common problems in a grow tent is overheating, what do I buy to stop this? I have read about a Cooling Tube, but arent exactly sure what it is.

You do not understand how much I appreciate any help. With every little piece of information you can help me with, you get me one step closer to living my dream.

*Most importantly need to figure out what system to use in a grow tent*
 
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