I just started my mobile welding business and wanted to know how much to charge for a 9x 40 double slide gate with corrugated metal instead of vertical bars. He is making me work with used metal that has vertical bars 6 apart on a 3 square tubing frame and Im going to install it and even have to do the concrete work because theres asphalt where the rail is going to be so i have to cut it out and put the concrete in.