Man, if you have such big dreams that you will compete with myspace or facebook, forget it... Remember how did they start? Creating something new, that didn't exist before. It was first like a college's website, than expanded to more schools because of who was in that college told others, and it expanded more and more until it became an international website. Also, they have profits to get that expensive equipment, else it wouldn't be possible.
I know this from a documentary on National Geographic (or Discovery, not very sure) called Download: The true story of the internet (it's in 3 or 5 parts don't know very sure) . It's pretty interesting for who wants to find out how the Internet appeared and developed.