I think you're gonna need more than 8'. Depends on the layout and size of your appliances/cabinets, of course, but you want to make sure you have enough room in between everything and plenty of counter space. Agree that you have to pick out what you want and draw everything out to make sure it fits.
My build is an "L" shape, 12' (long end) by 5' (short end). 32" grill, 12" side burner, and 18" sink on top; 22" fridge, 14" drawers, 18" cabinet and two 32" cabinets on bottom.