If you have having problems with the cable, it will be hugely better to fix those than it will be to add an electric stop. The cable stops always work
. I know of many, many boats that have happily replaced a broken solenoid with a cable, and none that have gone the other way.
If you don't have the mechanical chops to make the cable "unsloppy" you likely will not do a good job at designing and building a custom solenoid install.