Investing upto 20k USD on ethereum mining

[Amph]

Ethereum is not really profitable. You might never see your money back. A better option would be to buy coins which are PoS or creating Dash masternodes.

I've made 20 eth since March 10th,about .40 BTC,with 1 7970 & 1 380 4gig 

Income has slowed a little,but I'll ROI my shiny new 380 in 1 more week,my 7970 paid for itself with BTC/LTC/DOGE/FTC mining almost 2 years ago 

So,I have another PC just waitin for another vid card,maybe near the end of the month I'll get another one 

same 22 ethereum 0.5 total or more because i've sold half at 0.027 and not at today price, but right now it's not profitable as before, diff too high, the diff peak is shooting to 3k soem times

[sanadas]

Ethereum is not really profitable. You might never see your money back. A better option would be to buy coins which are PoS or creating Dash masternodes.

I've made 20 eth since March 10th,about .40 BTC,with 1 7970 & 1 380 4gig 

Income has slowed a little,but I'll ROI my shiny new 380 in 1 more week,my 7970 paid for itself with BTC/LTC/DOGE/FTC mining almost 2 years ago 

So,I have another PC just waitin for another vid card,maybe near the end of the month I'll get another one 

same 22 ethereum 0.5 total or more because i've sold half at 0.027 and not at today price, but right now it's not profitable as before, diff too high, the diff peak is shooting to 3k soem times

The difficulty rise  resumes after a few days pause. It is 35T now. Most of us will not be profitable in a few months.

[Jouliancoin]

Me and a friend of mine has made up plans[Managed funds]to start ethereum mining with at least $20k
Which Hardwares,Gpus would you suggest for us to build our rigs.
Also please provide your tips on mining as this is our first time,
and also suggestions on Ethereum,Mining,its future and sustainability

Wow! 20k is a lot of money 

I would recommend AMD graphics cards e.g. R9 290x. Here is a mining guide for pool-minig: http://etherbasics.com/tutorials/ethereum-mining-pool-tutorial.html

It might help you.

[sadasa]

$20k is a lot of money. If you have not invested it, it is better to wait a month or two to get the latest more efficient cards.

[Usainbot]

$20k is a lot of money. If you have not invested it, it is better to wait a month or two to get the latest more efficient cards.

So far, the information about the new efficient card from nVidia is not so encouraging. It is slower than expected.

[parmatiya]

I hope the new cards from the AMD can work better than their existing 390 cards and priced cheaper.

[sanadas]

I hope the new cards from the AMD can work better than their existing 390 cards and priced cheaper.

They may not be cheaper, but will definitely consume less power. They have smaller die size, 14 nm.