Given that the cost of mining is like $1 per coin or so
How come it's 1$ per coin?
What I see is 6 x RX580 ( 6 x 1.7 gps = ~ 10gps). For more than 24h, I can't mine even 1 coin..
I would advise against using a direct transfer to an exchange. If anything goes wrong you might get screwed. Install the "official" wallet in a Linux VM and withdraw to it using the file method, then send coins to the exchange as desired.
Would that work with a bootable Linux distribution on a USB stick?