Are you going to tie them all together and have one, or two if you do salt and fresh, central filter/sump systems???? That large of a water volume would be pretty forgiveing.
Ive added the 3rd bowfront, so now they are all connected. There will also be a tank in the dining room, which is now labeled "predator tank" but might end up as either a saltwater, mbuna, or predator tank.