Why not try a Realm Crafter forum?
This forum is for TGC products, just because TGC sells it, does not mean it has to maintain a forum for it - considering to use the product you have to sign up to the official forum anyway.
I bought it last week, mainly for the kids to use, but haven't had the chance to even install it yet. I think though, that it works by having a server application, so this might be on your own PC, in a server bank somewhere, or as some people might prefer, a cheap server in your house. Anyway, you would distribute a client program that people use to log into your server. So as long as your server is running, people should be able to log into your game. Your PC though is the place where your server is most likely to be - you'd run the server application, then run the game on the same PC, it's probably not a big performance concern as long as you have a reasonable PC.
The price is pretty good I think, I always think that a package like Realm Crafter can justify it's price in the amount of time you spend on it - if you get into it and like it more than you would like 2 new games, then your onto a winner. Really I have lost count of the number of hours I've spent on packages like DBPro, if I spent as much time on games then my XB360 gamer score would be about 10 times what it is

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My plan is to set the kids upon it, and if they get into it I'll make media and scripts to support their game idea. If it pans out I'd probably get Realm Crafer Pro, which is not out yet but uses a better engine, better graphics and faster, and not using Blitzmax, and just more and better of everything. I imagine there will be a discount though for RC1 users.