It would cost around $30 hour depending on who you get to develop it. That's what I would charge and it seems to be the going rate around here.
Fortunately - I'm already working on this and I'll be releasing it as a free add-on in the resource manger this week! (hopefully tomorrow, but I'm away for a few days after that - so it'll probably be later in the week). So it won't cost you a thing!
But... if you're feeling nice - a donation would be appreciated
I'll let you know when I've released it.
(It won't be able to move threads automatically into a specified forum, but I may incorporate that in the future)