Auto-Flower Bootstrap - 4x8 two 1000w HPS

Hi all starting my first grow and hoping to get some advice on my current plan. I'd like to eventually have a large tent for mothers and vegging and another tent for flowering. To spread the cost over time I'd like to first buy a 4x8 grow tent with 2 1000w HPS lights and a bunch of high yield autos. Then later buy another tent and switch from autos to regular strands.

Here is the equipment I'm looking to buy so far:

• 4x8 tent http://www.amazon.com/gp/product/B0...ue&ref_=ox_sc_act_title_1&smid=A2WRS4X4C0GMOQ
  
• 6 inch fan and carbon filter combo http://www.amazon.com/VenTech-VT-IF..._UL160_SR160,160_&refRID=1G4NAYJSHG2JE4TWSM4D
• 2 1000w HPS http://www.amazon.com/gp/product/B0...rue&ref_=ox_sc_act_title_3&smid=ATVPDKIKX0DER
• Heavyweight Dream Machine Autos http://www.herbiesheadshop.com/heavyweight-dream-machine-feminised-seeds-5622

What does everyone think? Am I underestimating the heat generated from this? Or am I over estimating the yield of these autos as compared to regular seeds? Any thoughts or suggestions welcome.

i think for 2000w you will need more than a measley 6" fan and filter

I found this video of a similar setup and it looks like he only has 1 input and output. As well as a single house fan inside.

yes but this video they guy has a 8-10" fan and filter, the bigger the better mate

Interesting, I guess I'm going to need a fan hood with 8-10" hood input or simply go 4x4 with 1 HPS. Don't see any 10" on Amazon but found a decently priced 8" inch hood.

Hood 8" - http://www.amazon.com/Powermaxx-GLX-RS8L-Cooled-Reflector-Hinged/dp/B00QR2W54O/ref=pd_sbs_86_40?ie=UTF8&dpID=41rECnca6sL&dpSrc=sims&preST=_AC_UL160_SR159,160_&refRID=1K948ZTY0XRNF85GH9A7

Fan Combo 8" - http://www.amazon.com/Powermaxx-GLFANXIF8CF8AD32C-Australia-Charcoal-32-Feet/dp/B00RWC5GUI/ref=sr_1_2?s=lawn-garden&ie=UTF8&qid=1450019327&sr=1-2&keywords=8"+fan+filter+combo

I'm guessing most grow-tents will be able to fit an 8" fan.

Can anyone who owns a 8" fan comment on the noise level?

I can't comment on the noise of the 8in fan but I will tell you that the tent I have, which is also off of amazon http://www.amazon.com/gp/product/B00FAAOC5O?psc=1&redirect=true&ref_=oh_aui_detailpage_o04_s00 , would not accommodate a 8in fan. The port holes are not big enough for 8in ducting to fit through.
I don't know if it would be the same situation with the tent you have though, it is a bit different. I'll also say that my buddy runs two 600w with a 6in fan/filter combo, only has to keep it on Med to Med/High to keep the tent at 75-80ish. I know you were originally talking about running two 1000ws, so a little different, but I think you'd still be ok with a 6in. If you bumped down to only one 1000w you'd definitely be good with a 6in IMO. Like JrizzlaK said, bigger is usually better but you also have to take in to account your tent size and what you really need to get the job done right.

I run a 4x8 with 2 1000w hps and a 8 inch can fan with a big phresh filter or can. Can't remember exactly.