how do you create your own social networking website like myspace, face book,friendster, or twitter?

[elven_rangers]

There's no 'recipe' for that.

You have to code all your way through and then some.

There can't be a 'cheap' way to do it, just think that if there was an open-source framework for a community, people would take it apart and put it back together to see how they can hack it. If you'd build a community the 'cheap' free way and made it a successful community, every 12-year old wizz kid would learn the code inside-out to hack his girlfriend-wannabe's account.