My opinion: don't pay for friends.
I remember freshman year, all they did was try to get people out to their rush events and whatnot. I went to a few and they were all the same, not sure how you managed to choose sigma chi with sigma nu trying to recruit right out of high school. Eventually they all just got the message, not interested. The only plus to these "bro"hoods are the associated sororities you get to mess around with. And then again, the shit these girls go through just to wear some letters says a lot about them :l