Altwebdesign

I'm looking for some webcam chat software to use on a solo girl website here are my requirements:

Ability for one single model to sign in and perform a live webcam show
the show is streamed to the viewers in the room all at the same time
viewers and solo girl have the ability to type into a chat room
1 viewer to have the ability to go into a 1-on-1 private chat with the model, this stops the stream in the main room and is paid for by the viewer purchasing pay per minute "credits"
When the credits run out the 1-on-1 show stops


If anyone can point me in the right direction that would be great!
Thanks