Congratulations! It's a big decision in your life. I wish I could minor in music.
Thank you. What keeps you from minoring in music?
My thought is even if not possible now, it could be a possibility in the future. I've been saving my money for 2 years, only to find that I need to take a course to get accepted as a student in the university (+ 1 year)

. No matter, the music program will still be there.
As for your family, it could be a courtesy that they're willing to leave to let you practice... I wouldn't want to have somebody practicing while I'm trying to do my own thing, but I know a lot of people who would put their TV watching ahead of somebody's piano practice - "HEY DON'T MAKE THAT RACKET WHILE I'M WATCHING LOST!".
I have a Baldwin Acrosonic (it's a spinet) in my apartment and I have practiced as early as 9 am, and as late as 8 pm, and nobody has ever complained.
I think you use reasonable hours for that. I'm willing to put up with noise from my neighbours during those hours.
Another advantage of a digital: my favorite time to practice is starting at 6:30AM, and sometimes I get an inkling to play something at midnight

An acoustician told me once that it was "impossibe" to truly dampen a piano because buildings with wood floors and beams act as sound boards.
You need concrete to dampen sound and he said even that failed.
Even with my digital, at my parents house, I was told the force from the attack could be heard through the floor

Once I was looking into what it would take to soundproof a room, and I found it would be ridiculously difficult to really prevent the sound from travelling through the walls, floor, doors, windows, duct work, even the foundation...