I ran a web hosting company for 2 and half years, I just went along learning as I went gaining customers and making relationships with people who can make me better. I sold the company so I can go to college and learn more and better myself. You are no better then I am yet your acting like your the next Warren Buffet. I am 20 years old with 3 years of college education from a university. Anything web related either, hosting, developing, designing, can all be taught and learned as you go for free with the internet. You cannot do that for building a car audio company. To start an online business you need roughly ~$100 start-up and I couldn't even guess how much for a car audio company. Most new companies do not turn a profit for 2-3 years, your asking for someone to invest THEIR money and 3 years of no profit so you can be part of owning a car audio company. You have high goals, but you have to be realistic.
Sorry for the ramble but for those who don't know ANYONE can be a run proxy websites. Scripts are free, and I use to sell hosting for as low as 4 a month. If that's what he is claiming he owns, its a joke.
Everyone here is trying in a nice way to let you know your over your head. Good luck and if for some reason some millionaire who is on this site who is a Engineer and wants to work with you best of luck to you both.