If you put the % of maintenence price , it will be much lesser then %1 per day. It will probably go lower then the cost of keeping them and you will have loss everyday you keep it. Not anytime soon but it will be there until june.
No this is calculated after maintenance. At 390 USD/BTC and 0.18 per THs you are mining about 0.00157 BTC/Ths/day net, which is 0.9% yield per day. Or in so hated ROI terms 115 days
