LOL. Seriously 3 of us at the auction considered buying the six slot at the last super auction. It only went for $350, but none of us would have been able to fit through the doors. I would have been able to put it in the garage, but the weather would have gotten to it. Word of Advice: never get a cab that you know you won't be able to fit through the door.
From what I've seen inside neo cabs, they're only kept together with nails and wood glue, and maybe some wood biscuits. I would try to find a good glue dissolvent and try using a prybar. You will probably have to remove some of the vinyl siding to get to any nails/screws underneath.