well you can spec out a Mac Pro with HD's in each bay, more RAM and two cinema displays
for about £6000 - of course you can spend more, but I think this should be enough for
your needs, add FC Studio to that for another £800 and you're good to go. As far as
connecting a camera to the Mac, well that usually depends on the output of the camera -
Firewire, etc. So you may need another box or card to add to your set up, but that
shouldn't be too expensive considering your budget.
I honestly think you ought to sit down calmly, take a stress pill and think things over