I am quite happy with my
silent system.
I much prefer it to an electronic keyboard.
This ways I keep the touch of the piano and I can play with headphones and even output to the computer. Basically you can play in your own piano without bothering anyone (unless they are bothered by the noise of the piano mechanism itself, just thought of that one...)
Not sure about the price range they are in though, could be a bit expensive I guess.
Still, it is another option you may want to consider.
Above all, don't be discouraged. 4hours of piano a day is a lot for non musical people.
And since I bet most of those hours will be incessant hammering tedious practice drills it's not unusual to find other people complaining.
It has nothing to do with the way you play, they would go nuts even if you play like Horowitz.
Believe in yourself.
