not sure, most is just extra scap I have lieing around. I used 3/8s for the mounts, framed the thing up with 2.5 inch square tubing with 3/8" walls, 1/4 inch for the center section and skid plate, and ten gauge for the sides. I believe a 1/4" 4 by 8 sheet for my local black smith was 220, which is plenty for a bumper. Ive got about 25 tied up in grade 8 bolts, about 5 dollars in expanded metal, and not sure what the food grade stainless pipe cost I'm using for the guard.
It can be done for 300 easily made out of 1/4 inch all around with hardware and thicker metal for the mounts.
The thing that took me the longest was making a mount that use the 3 bolt holes for the stock tow hooks and the four holes for the stock bumper mount
I'll say its nice getting something built that no one else has