Fret not. What we've done in the past RP wise was mostly on the internet or skype. So over all it will not raise your costs. So if you can go into a chatroom/chatbox you should fine.
I also should mention that there are other ways to RP. Here is a list of what I know.
Tabletop- Those DnD games that you see where people roll dice and such. Capable on being done through the internet.
Forum/Written: Play by Post, Basically you write an entire post for the RP and then someone else Posts and so on.
Chatbox: Much more faster then the Forum/Written though instead of posting you're just RPing in a chat room.
LARP- Live Action RolePlay... need I say anything else?
We actually have an RP section here in Dragnix. If you wish you could join up in Alondor's RP. I'm sure nobody will mind helping you get some footing on Role Playing.
LINK:
http://www.dragnix.net/Msg_Board/phpBB/ ... 891#p40891