Fish cleaning stations can be cheap and they can be expensive. Specially expensive to maintain. Maybe they should just have a few tables around a barrel for the guts and a water hose or two set up above a catch basin. Cheap to buy, cheap to maintain and the barrel can be picked up daily by a garbage truck or a cosmetics company ( to render the oil used in the cosmetics industry). The expensive ones include a shed, a grinder and some more fancy things. But one thick knife or pair of pliers that is dropped ruins the grinder and that is why they are so expensive and hard to maintain. Personally, I think it would be best to clean the fish on the water and bring the fish to shore with the skin on so measurements can be taken. The money that is saved this way way can be used to build proper toilets which often are absent.