I went with the ronco. I had all the connections come out the top. Pump in, inspection, vent and a pickup tube that reached almost to the bottom. I did it this way so if there is a broken hose or fitting everything stays in the tank. Where it is supposed to stay, not like my last aluminum tank. when you get the tank you can have the connections put anywhere you want.
That derelict boat was another dream for somebody else, don't let it be your nightmare and a waste of your life.