Damn dude that's some bullshitza for sure. My dad fronts me money when I need a little extra cash to buy stuff, course he never really asks specifically. He always like, what is this for? I said car audio, he goes ahh of course. Always pay him back though. But some parents are just like that. If he is just completely intolerant the only thing you can do is try and hide it from him until you aren't under his roof anymore. If you are in his house, than it's his rules plain and simple. But that doesn't mean you should sacrifice your passion for car audio, because it's not like it's hurting anyone. Hope it works out bruh