Fences give cover to infantry, and are difficult terrain.
Buildings I think we should treat the building itself as ruins. The courtyards are simply DT, cover for infantry. Vehicles and monstrous can't go inside though, they have to move completely through. The question is, should they be tall enough to completely block LOS to vehicles/MCs?
Same question for the hill in the middle: Tall enough to completely block LOS to vehicles/MCs, or only tall enough to give cover to vehicles/MCs?
Any suggestions/objections? BTW, I already placed the first objective as you might have noticed.