Regards all. Quality advice needed on 2017 Oct initial mining rig

[spitfireabc]

From: Spitfire
Re: The most cost effective initial bitcoin mining rig.

Firstly,

Thankyou for viewing my post and all, esp. quality replies are very appreciated.

I'm starting out bitcoin mining and really need a good steer on an initial setup. My current take on it, is to view the most up to date cost/return GFX card site projections, and go with, say; a quality 1200w psu, and a 6 card rig. Not 7. Not 8. Not 45.
 - 6  or multiples of 6, separately.

Is this correct?

2. What, when it comes to an initial rig, is the consensus on second hand, but only just, IE 'as new' GFX card utilisation on said 6 card rig?
 - I know they take a beating, but on just a starter rig, would it be worthwhile forfeiting warranties, etc. 
for the saving and potential better ROi? IE a 3 month rig, say, to break even then, say again?

Again,
Thankyou for replies.
Spitfire.

[-ck]

Bitcoin cannot be meaningfully mined with GPUs in 2017. You need to purchase an ASIC to mine bitcoin such as either the avalon 741 or the bitmain antminer S9. If you're thinking of altcoin mining then you're posting in the wrong place.