Travertine Stone From Turkey

Dear We need the stone attached. We would like to know the time frame to produce 180 square meters of this stone in tiles 600*600*20 and what is the payment process. We need it urgently. However the price is higher than we expected, can you cooperate with us on that. We are ready place and order and come over to your factory. Kindly let us know your location. Best regards, Oleg