We use 5-foot diameter nets up here for sockeye salmon, not to just land the fish, but to catch them. Almost everyone has an aluminum one bought from a local welder for $180 or a mass-produced one out of bent galvanized conduit for $159.
I had 1/8″ plywood left over from my stitch-n-glue kayaks and laminated a wooden frame out of multiple layers. Total hack job, but it worked, was lighter, and neutrally buoyant in the water. After using it for 16 years, I took the net bag off, routered the edges smooth, put some finish on it, changed the rusty galvanized hardware to stainless and reassembled it. Good for another few decades.