So I was comparing the prices of the Animated Object buildings and found that animating individual rooms and having them act as larger buildings is, of course, more expensive both in time and gp.

Animating several large rooms as a single gargantuan building feels cooler and more imposing. However, you even get more hp out of animating a greater number of objects of a smaller size.

In the end the deciding factor was that a) our Bard can give allies Fast Healing in a area and the more individual pools of hp there are the faster the total recuperates, and b)I can't carry a gargantuan construct in a Portable Hole but two large constructs CAN squeeze into a single Portable Hole just fine.