You might already have a secure room? Perhaps on the second floor? With window bars and access control? Then you should not pay for extra protection that you don’t need. It is sufficient to use EAGLE Light electronic key cabinets.
It holds up to 96 key bunches. Thinner steel and a solenoid lock. Not secure by definition, but not a piece of cake to break in to either.
Of course it is possible to combine several cabinet of EAGLE Light. Up to six electronic key cabinets in one assembly.