You should look at Optimus electric steering. It's completely programmable. It has a feature called proportional steering
View attachment 655385. It dynamically changes steering rate based on speed. So if you're running fast, turning the wheel turns the motor less but while at idle it turns it a lot. I think I've got mine set up as 2 turns lock to lock at idle.
You get zero feedback too. And, you can adjust the amount of resistance you feel while turning. Not that's it's all that important in your case, but it ties into your N2K network so you get rudder angle indication.
Yes, mine's a single engine 24', Tidewater. It's an awesome boat. Got me to Great exuma from Ft Lauderdale and back (over 800 miles).
View attachment 655384