Markvh,
My apologies....i just re-read your intial post and you said nothing about giving away free big movies like the other sites are doing. Your question about starting a movie site is no different then starting a TGP.
It's all links....unless ofcourse you were planing to post your own movies for download.
As far as bandwidth for a normal movies site that contains movies links, i'm really not sure. Not much at all though.
And if you were actually talking about posting your own big movies...well then GFY!