Step by step DIY instructions (and cost breakdown) for the concrete mesh and rebar trellises. Maybe just the metal/mesh mounted to the top of the fence? Decorated with something to fill in the space until the hops cover it?
Revitalize a Path Rebar (or another heavy-duty metal rod) creates an uncommon archway entrance and gives climbing plants an unusual lift up. Think outside the arch for inexpensive materials at yard sales or from the depths of your garage.