Mining startup questions on profitability and POS

[wishinsky]

Hello everone. Im seriously interested in Mining. I Have $7,000 which will build me 3 - 6gpu computers and a small windmill  for cheaper electricity. Will this literaly make me a passive income. My research shows about $1,000 current monthly profit. I seem to understand Proof of stake and still sounds profitable when it happens. But it's based on how many coins you can stake per transaction. How fast can each transaction be processed and how much can be made with minimal coin start up. Let's say 10  coins to stake