I've been thinking of of making a character who focuses on the use of a repeating ballista, a Huge, Heavy Repeating Crossbow. Until recently i was just going to build it mounted on a wagon, maybe upgrading to floating disc later on in his career. Then a friend suggested an animate object/ Construct body. If i were to go down the construct route how much would it cost to make a 4-6 legged steel table with a 10-10 surface area to mount the weapon to?