What business should I select?

I'm 13. Over the summer, I want to start an online business. I have many ideas, but ive posted the two that struck me the most. I feel these are great ideas, but I'm not sure which one to choose. My goal would be to make six or more figures a year. I know that sounds crazy since I'm only 13, but it's my goal. I would love to become financially independent.

1. My first idea is my favorite. It is a website where users can submit original songs, and other users can listen, rate, comment, share, and chat. There would also be features where users could post info and where bands could find new band members. I would make money from selling ad space, and maybe creating a pro membership with extra features if the site becomes big enough. Some problems I ran into when I was thinking on this idea was not having enough money to create the site. I thought it could cost $100,000 to have a web design firm create the site. Then i realized my cousin has been at RIT majoring in web design and programming for 2 years. I asked him, and he said he would be happy to build the site. Althoguh he may not be a professional, this site that he builds could be a "beta" launch, and money I make from it, I would reinvest into the site. My grandparents also called me yesterday saying they would love to give me money for marketing.

Idea 1 Overview

Target Customer: musicians, artists, independent artists, songwriters, record producers.

Revenue: ad space, pro membership

Variable Costs: websit matinence, domain, hosting, marketing

Type of business: online business, online company, internet business, Internet company, small business, service business, social network site, online community.

2. My second idea is quite simple. I would create a basic website with storefront capability, and sell musical instruments such as guitars,bass, drums, keyboards, dj, mixers, lighting. I would buy the products from a wholesale/dropship company. Vthey would dropship the items when I give them the order details. I would price competitively but price to make a nice profit.

Target customer: musicians, bands, artists, guitarists, djs, keyboardists, record producers, drummers, bassists.

Revenue: ads on site, selling products

Costs: website, website matinence, domain, hosting, wholesale products, marketing

Type of business: online business, retail, ecommerce.

Idea 3. This would be a website where users can store photos and or data on a secure digital storage site. It would cost users 4.49 a month and they get a certain amount of storage. My cousin would program the site. I would also have great security features for customers. This is a new idea and I know I would be competing with brands such as mozy, photo bucket, etc, but I feel I can start small and build up a better brand name.

Overall, I love the first idea and the third.. Which idea should I do? Which idea is more profitable? Even if you don't like either, please choose the one of the above if you had to choose. I have been going to a Business Camp at my school and I enjoy it.