All depends on your expectations and when your GPUs were bought. 6 1080 Tis still mine over $10 a day, that is plenty profitable to me. However, all of my 1080 Tis were bought last year for below $750 each and 1070s for $334 or less. They paid them over several times already, anything they make at this point is easy free money. To me, mining is worth it.
Actually
now doesnot matter how many money have you paid for your rig. You will never recoup it. Just use calculator. But if you electricity is cheap or even free - you can buy some perks after paying electricity bills.