I like the idea, as i am young and don't really want to spend too much of my money on something that i could get for free.

I think you should have a rule that, say you can only have hosting if you have been at TalkFreelance for 6 months, or something along them lines, that way you won't get people just joining up to TalkFreelance for hosting.

I would say a certain post count but that would get members to just spam to get their posts up.