So does your 30fps video take around 300 minutes?
How large are your videos? Is your content trimmed as much as possible, removing fluff e/t/c?
Just set your computer to auto sleep after so many hours if you don't want it running all day. Really though it's not going to hurt the computer. Think about it every office out there is full of computers that run constantly. It's not like it's left processing constantly it's just on at idle really.
How old is your router and wireless card? It could be a case of being an older standard, maybe
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2.66gb is a big file how long are they? you could try changing your codec to one that compresses it abit more h.264 or something, might speed it up abit.
Have you tried something like this...
http://www.netgear.co.uk/home/products/networking/powerline/
I use them and they are great, very reliable.
I upload 60 and unless it's a very long video,it takes 1 - 2 hours (and I don't have super fast internet).
I think my Sony Vegas settings weren't where they were supposed to be. I'm not sure.