It's a really neat idea, not for that much money though since the condition doesn't look that great (cleaning or not). But the design could have so many options, ooo I want one lol
I think that would look cool with a 'wall down the center'. Think about it - one tank is in one room and the second tank is in the other room. You could have one side lighted and nicely planted and then have the other side be darker with caves. The plants would still help keep the nitrates down... it would work well.