Quick update here, and keen to hear your thoughts guys.
Apparently Evinrude does not support a 3rd helm on their digital throttle/shift system. So my idea of installing controls on the station has been stonewalled. I can still install a steering wheel back there, but no engine controls.
In my view, the helm/steering wheel functionality is the more important than controls back there while fishing. Once I get the lines and riggers set up at the speed I want, I fiddle way more with the tack/course vs the speed (i.e. steering). If I need to tinker the speed, darting inside or to the flybridge isn't that big a deal. In a perfect world, I would have controls and wheel on the steering station, but it does not sound like an option, and I don't want to eliminate either the cabin or flybridge controls / steering as I use both.
Another option that was suggested to me is one of those Garmin autopilot systems (
Reactor™ 40 Hydraulic Corepack with SmartPump v2, with GHC™ 50 Autopilot Instrument). I have zero experience with these, and holy smokes they are pricey. Can't say I've ever been a fan of FOB style steering; however, I have also never used one before. If I went this route, I probably wouldn't need a steering station, I would just flush-mount the screen / electronics to that back cabin (starboard) wall below the window.
What would you guys do?