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.