Also if I mine ETH for $100k investing in Rigs and Cards which would then mine only ETH how much per day I can earn in terms of dollars.
Familiarise yourself with Whattomine for all profitability based calculations.
Look to buy our large farms which would be getting rid of GPU's for dirt cheap, do not buy new.
Do not buy 4GB GPU's anymore, ETH DAG would cross 4GB later this year and they will become useless for mining.
And lastly do not be lazy, do your own research, do not expect someone to do the calculations for you. If you get stuck somewhere, ask in the forums and people will be willing to help.
But ask for help with some data at hand that shows us that you have done your research and are truly in need of help.