Who knew you would get such abuse.
I think that some may be overestimating the thrust needed to move the bow laterally. A little thrust applied continuously is what is wanted. Even in large vessels, bow thrusters generally don't develop a lot of horsepower, and an electric trolling motor that will produce 100 pounds of thrust could be quite effective, depending on the boat.
There are two problems; (1)mounting and (2) stowing when not in service.
If all else fails, you can put one of those little swivel seats that they put in bass boats on your foredeck and fish!