1. Its primary center will be located in the OT parallel dimension accessible by portal [ DCQvUfH ]. Secondary center will be located in some yet to be determined thread.
2. Security is always same. It never lowers, neither heightens
3. Likely 5 kilotons if you figure out where the safe is. It is setup such that you don't interact with the bank directly, but one of its centers. The transactions are later delivered to a secret location where the bank is located, escorted by a tactical squad.