Sometimes I feel sorry that I am not spending as much time.
If you still work full time and if your kids are still around, it would be hard to spend more than an hour per day for the music.
However, if you are a true music lover, you can still find time for music because the music brings a joy to your life. I listened to the music especially when I am tired and somewhat feel empty. The music always feels the void.
My average time for music (in active listening mode, not as a background music or casual listening) is about 5 hours per week. Hope I can pull more hours.