The charcoal basket cost me almost nothing and was nearly all salvage material. The grate was a junk yard find of an old gas grill grate for $1. The expanded metal was out of a steel shop leftover pile and cost me $5 for 13"x52". The bolts and tie wire were leftovers from an old project.
I simply cut the grate to square with the angle grinder. Bent the expanded metal into a square and wire tied it to the grate. Twisted a pair of wire for a handle and bolted the legs on.