Thanks for the comments Ryan and Michael.
As for the humidity... the tank is direct across from a large HVAC register. I am planning on install a vent in the far left side of the fish room (the is actually the study inside the house, whereas the tank is in the library). I am hoping this will create enough cross flow. If this does not work. I will be installing attic style fans that I will connect to the aquacontroller.
I finished sanding the drywall, so I will be painting the room today and posting pictures of the same. Also I received the new gaskets for the bulkheads, so there is a good possibility I will be putting water in tonight!!!
As for what is going in the tank. I currently have a 75 gallon reef tank that has a good bit of coral in it (a couple different brain corals, goni, several polys, several zoas, some sps, several varieties of mushrooms, lobo, acans, etc.). As for the livestock that will be moving from the 75 to the 210... There is a pair of clown fish, blue hippo tang, chromis, yellow watchman goby, diamond goby, mandarin goby, blue cleaner wrasse, pair blue damsels (going in 40 breeder sump home), sand sifting star, serpent star, 2 emeralds and other cleanup crew.
I am going to wait about a month after the water and sand is set in the 210 before moving everything over.